There are 855 nine-letter words containing A, M and 2S, https://www.bestwordlist.com/c/a/4/9letterwordswithamss.htm ABELMOSKS ABSURDISM ACCUSTOMS ACOSMISMS ACOSMISTS ACROSOMES ACROTISMS ACTINISMS ACTIVISMS ADAMSITES ADMISSION ADMISSIVE AIMLESSLY ALARMISMS ALARMISTS ALASTRIMS ALBINISMS ALBUMOSES ALGORISMS ALIENISMS ALLELISMS ALMAGESTS ALMSHOUSE ALPINISMS ALTISSIMO ALTRUISMS AMASSABLE AMASSMENT AMAUROSES AMAUROSIS AMBASSAGE AMBASSIES AMBROSIAS AMBUSHERS AMEBIASES AMEBIASIS AMETHYSTS AMIDSHIPS AMISSIBLE AMNESIACS AMNESTIES AMORTISES AMPASSIES AMPLENESS AMUSETTES ANAMNESES ANAMNESIS ANEURISMS ANEURYSMS ANGSTROMS ANTIMASKS APHORISMS APTERISMS ARCHAISMS ARMORISTS ARMORLESS ASPERMIAS ASSEMBLED ASSEMBLER ASSEMBLES ASSUMABLE ASSUMABLY ASSUMEDLY ASSUMINGS ASSUMPSIT ASTERISMS ASTIGMIAS ATAMASCOS ATMOLYSES ATMOLYSIS ATOMISERS ATROPISMS ATTICISMS AUTECISMS AUTOSOMES AXOPLASMS BABELISMS BADMASHES BALMINESS BARMINESS BASEMENTS BASHAWISM BASHMENTS BATHMISMS BEAMINESS BETACISMS BIGAMISTS BIMBASHIS BINARISMS BIOMASSES BIOPLASMS BISMARCKS BLAMELESS BLASTEMAS BLASTOMAS BOYARISMS BUDMASHES BUSHMEATS CABALISMS CAESARISM CAFFEISMS CALAMUSES CAMBOOSES CAMISADES CAMISADOS CAMISOLES CAMPINESS CAMPSITES CAMSHAFTS CAMSTANES CAMSTONES CAPSICUMS CAPSOMERS CASCHROMS CASEMATES CASEMENTS CASEMIXES CASEWORMS CASHMERES CASIMERES CASIMIRES CASSIMERE CASTEISMS CASUALISM CATHISMAS CERAMISTS CHAMISALS CHAMOISES CHARISMAS CHARMLESS CHARTISMS CHASMIEST CHILIASMS CHLAMYSES CHLOASMAS CHRISMALS CHUMASHES CLASSISMS CLASSMATE CLASSROOM COASSUMED COASSUMES COMMISSAR COMPASSED COMPASSES COPROSMAS COSEISMAL CRAMESIES CROSSARMS CROSSBEAM CUSTUMALS DAMASKINS DAMASSINS DAMNDESTS DAMOISELS DANDYISMS DEMITASSE DESTREAMS DIASTEMAS DIGAMISTS DISABLISM DISARMERS DISCLAIMS DISMALEST DISMASKED DISMASTED DISMISSAL DOMESDAYS DONATISMS DOOMSDAYS DRAMSHOPS DREAMLESS DRESSMADE DRESSMAKE DWARFISMS DYNAMISES DYNAMISMS DYNAMISTS DYSMELIAS EASEMENTS EGGMASSES EMBARRASS EMBASSADE EMBASSAGE EMBASSIES EMBRASORS EMPHASISE ENCOMPASS ENSAMPLES ESCAPISMS ESEMPLASY ESTIMATES ETATISMES EXOPLASMS FABULISMS FACEMASKS FAIRYISMS FAKIRISMS FAMILISMS FARADISMS FARMERESS FATALISMS FINALISMS FISHMEALS FLAMELESS FOAMINESS FOREMASTS FRAMELESS FUMARASES FUSARIUMS GAMBESONS GAMBUSIAS GAMESHOWS GAMESIEST GAMESTERS GAMEYNESS GASCONISM GESSAMINE GIANTISMS GLASSWORM GOSSAMERS GOSSAMERY GRAMASHES GRAMPUSES HAMMINESS HAMPSTERS HANDSOMES HASHMARKS HEMATOSES HEMATOSIS HEMOSTATS HISPANISM HISTAMINS HOMESTAYS HUMANISES HUMANISMS HUMANISTS HUMANNESS IDEALISMS IMAGELESS IMPASSION IMPASSIVE INFAMISES INSOMNIAS IOTACISMS ISARITHMS ISCHEMIAS ISOBARISM ISOCHASMS ISOGAMIES ISOGAMOUS ISOMERASE ISTHMIANS JEHADISMS JESSAMIES JESSAMINE JIHADISMS JURYMASTS KABALISMS KAISERISM KHAMSEENS KHANSAMAS KISSAGRAM KISSOGRAM KOMISSARS LABORISMS LACONISMS LAMBASTES LAMBSKINS LAMISTERS LAMPASSES LAMPERSES LAMPPOSTS LEGALISMS LOAMINESS LOCALISMS LOSSMAKER LOYALISMS LYSOSOMAL MACARISES MACARISMS MACASSARS MACHISMOS MACHOISMS MADAROSES MADAROSIS MADERISES MADHOUSES MADNESSES MADRASAHS MADRASSAH MADRASSAS MAESTOSOS MAGESHIPS MAGISTERS MAGNESIAS MAIASAURS MAILSACKS MAILSHOTS MAINMASTS MAINSAILS MAINSTAYS MAISTRIES MAJESTIES MAKEFASTS MALLEUSES MALSTICKS MALTINESS MALTSTERS MALVASIAS MALVESIES MAMSELLES MANGINESS MANIFESTS MANLINESS MANSCAPES MANSHIFTS MANSWORNS MANTISSAS MAPSTICKS MARCHESAS MARIPOSAS MARMOSETS MARQUISES MARSHALLS MARSHIEST MARSPORTS MASCARONS MASCULIST MASHIACHS MASHLOCHS MASOCHISM MASOCHIST MASONITES MASONRIES MASOOLAHS MASSACRED MASSACRER MASSACRES MASSAGERS MASSAGING MASSAGIST MASSCULTS MASSETERS MASSEUSES MASSICOTS MASSINESS MASSIVELY MASSOOLAS MASSTIGES MASSYMORE MASTABAHS MASTERIES MASTHEADS MASTHOUSE MASTICHES MASTICOTS MASTODONS MASURIUMS MATCHLESS MATELASSE MATESHIPS MATEYNESS MATRASSES MATROSSES MAXIDRESS MAXIMISES MAXIMISTS MAXIMUSES MAYBUSHES MAYFISHES MAZEDNESS MEALINESS MEASLIEST MEASURERS MEATINESS MEDALISTS MEGADOSES MEGAGAUSS MEGASTARS MELANISES MELANISMS MELANISTS MELANOSES MELANOSIS MEMSAHIBS MENSWEARS MERSALYLS MESCALINS MESCALISM MESHUGAAS MESOBLAST MESOCARPS MESOGLEAS MESOPAUSE MESOSAURS MESOSCALE MESOZOANS MESSAGING MESSALINE MESSIANIC MESSIASES MESSMATES MESSUAGES METABASES METABASIS METALISES METALISTS METASOMAS MIDSEASON MIDSPACES MISADAPTS MISADJUST MISADVISE MISAGENTS MISALIGNS MISALLIES MISALLOTS MISALTERS MISARRAYS MISASSAYS MISASSIGN MISASSUME MISATONES MISAVISED MISAWARDS MISBIASED MISBIASES MISBRANDS MISCLAIMS MISDREADS MISFAITHS MISFEASOR MISFRAMES MISGAUGES MISGRADES MISGRAFTS MISHEGAAS MISLABELS MISLABORS MISLAYERS MISLEARNS MISPAINTS MISPARSED MISPARSES MISPHRASE MISPLACES MISPLANTS MISPLEADS MISPLEASE MISPRAISE MISRAISED MISRAISES MISSAYING MISSEATED MISSHAPED MISSHAPEN MISSHAPER MISSHAPES MISSIONAL MISSPACED MISSPACES MISSPEAKS MISSTAMPS MISSTARTS MISSTATED MISSTATES MISTAKERS MISTRACES MISTRAINS MISTREATS MISTRIALS MISUSAGES MISVALUES MOCASSINS MOCCASINS MODALISMS MODALISTS MOLECASTS MONADISMS MONASTICS MONOTASKS MONSTERAS MOONSAILS MORALISES MORALISMS MORALISTS MORASSIER MORTSAFES MOSAICISM MOSAICIST MOSASAURI MOSASAURS MOSSBACKS MOSSLANDS MOSSPLANT MOUSEMATS MOUSEPADS MOUSSAKAS MURALISTS MUSACEOUS MUSCADELS MUSCADETS MUSCADINS MUSCATELS MUSICALES MUSICIANS MUSSITATE MUSTACHES MYDRIASES MYDRIASIS MYOBLASTS MYSTAGOGS NABOBISMS NAMASKARS NAMESAKES NASALISMS NATIVISMS NATURISMS NAVALISMS NEOPLASMS NESTMATES NOMADISES NOMADISMS NYSTAGMUS OAKMOSSES OBEAHISMS OGHAMISTS OPSIMATHS ORGANISMS OSSARIUMS OSTOMATES OSTRACISM OUTSHAMES OUTSMARTS OVERMASTS PACIFISMS PAEANISMS PAGANISMS PALUDISMS PANISLAMS PAPALISMS PARAMESES PARECISMS PARMESANS PAROSMIAS PAROXYSMS PARTYISMS PASHADOMS PASHMINAS PASPALUMS PASSAMENT PASSEMENT PASSIVISM PASSMENTS PASTRAMIS PASTROMIS PERMEASES PETALISMS PHALLISMS PHANTASMS PLASMASOL PLASMOIDS PLASTRUMS PLATEASMS PLATYSMAS PLEONASMS POSTMARKS POTASSIUM PRESSMARK PRESTAMPS PRIAPISMS PROSAISMS PSALMISTS PSAMMITES PTYALISMS PYRAMISES QABALISMS QUACKISMS QUALMLESS QUAMASHES RACEMISES RACEMISMS RAMSHORNS RANSOMERS RASCALISM RASMALAIS REALMLESS REASSUMED REASSUMES REGALISMS REMASTERS RESAMPLES RHAMNOSES RHAMNUSES ROMANISES ROSARIUMS ROSHAMBOS ROYALISMS RURALISMS SABBATISM SAECULUMS SAGAMORES SAILROOMS SAINTDOMS SAINTISMS SALEROOMS SALESROOM SALMONETS SALMONIDS SAMARIUMS SAMEYNESS SAMIZDATS SAMPHIRES SAMPLINGS SAMSKARAS SANDPUMPS SANDSTORM SANDWORMS SAPPHISMS SAPREMIAS SARCOSOME SARGASSUM SATANISMS SATURNISM SAVAGISMS SCALPRUMS SCAMBLERS SCAMPINGS SCAMSTERS SCANDIUMS SCARMOGES SCHIEDAMS SCHMALZES SCHMATTES SCIMETARS SCIMITARS SCLEREMAS SCLEROMAS SCOLIOMAS SCOTOMIAS SCRAMBLES SCRAMJETS SCREAMERS SCRIMSHAW SCUMBALLS SEABREAMS SEADROMES SEALYHAMS SEAMINESS SEAMOUNTS SEAMSTERS SEATMATES SEISMICAL SELAMLIKS SEMANTICS SEMBLANTS SEMESTRAL SEMICOMAS SEMIGALAS SEMINATES SEMINOMAS SEMITAURS SEMOLINAS SEMUNCIAS SERAPHIMS SERIALISM SESAMOIDS SEXUALISM SHAMANISM SHAMANIST SHAMEFAST SHAMELESS SHAMIANAS SHAMISENS SHAMMASIM SHAMMOSIM SHAMOISED SHAMOISES SHAMROCKS SHARESMAN SHARESMEN SHAWARMAS SHIPMATES SHMALTZES SHORESMAN SIAMESING SIDEMEATS SIGHTSMAN SIGMATISM SIMARUBAS SIMAZINES SIMONIACS SIMULANTS SIMULATES SIMULCAST SINAPISMS SITKAMERS SITZMARKS SKIAGRAMS SKIDMARKS SLALOMERS SLALOMIST SLAMMINGS SLIMEBAGS SMACKINGS SMALLAGES SMALLBOYS SMALLNESS SMALLSATS SMALMIEST SMALTINES SMALTITES SMARAGDES SMARMIEST SMARTARSE SMARTNESS SMASHABLE SMASHEROO SMASHINGS SMEARCASE SMEARIEST SMIERCASE SOCIALISM SODAMIDES SOLARISMS SOLARIUMS SOMASCOPE SOMATISMS SOMATISTS SOMEDEALS SOMEWHATS SOMNIATES SONOGRAMS SOULMATES SPADESMAN SPADESMEN SPAMMIEST SPAMMINGS SPANWORMS SPASMATIC SPASMODIC SPHAGNUMS SPIRALISM SPOILSMAN SPOKESMAN SPORTSMAN SPUMANTES SPYMASTER SQUAMATES SQUAMOSAL SQUAMULAS SQUAMULES SQUEAMISH STALAGMAS STAMPEDES STAMPEDOS STAMPINGS STAMPLESS STATESMAN STATESMEN STAUMRELS STEAMIEST STEAMINGS STEAMSHIP STEARSMAN STEARSMEN STEATOMAS STEERSMAN STEMHEADS STEMWARES STEPDAMES STERIGMAS STOMATOUS STRABISMS STRAMMELS STREAMERS STRIATUMS STUDFARMS STUMPAGES SUBCLAIMS SUBFRAMES SUBHUMANS SUBIMAGOS SUBMUCOSA SUBSAMPLE SUBSCHEMA SUMMARIES SUMMARISE SUMMARIST SUMPITANS SURMASTER SURMISALS SURNAMERS SWAMPIEST SWAMPLESS SWARAJISM SWARMINGS SWIMWEARS SWINGARMS SWORDSMAN SYCAMINES SYCAMORES SYLLABISM SYMITARES SYMPLASTS SYMPOSIAC SYMPOSIAL SYNGAMIES SYNGAMOUS SYNODSMAN SYNTAGMAS SYSADMINS TACHISMES TALISMANS TAMARISKS TANTRISMS TEAMSTERS TERATISMS TESTAMURS TESTATUMS TIRAMISUS TITANISMS TOADYISMS TOTALISMS TRANSMEWS TRANSMITS TRANSUMES TRIADISMS TRIALISMS ULTRAISMS UNAMASSED UNASSUMED UNMASKERS UPSTREAMS URBANISMS USERNAMES VASCULUMS VASOSPASM VEGANISMS VITALISMS VOCALISMS VOLTAISMS WAMPISHES WASHROOMS WASSERMAN WASSERMEN WOMANISES WOMANISMS WOMANISTS WOMANLESS WOMANNESS WORMCASTS XANTHISMS YAHOOISMS