There are 757 eight-letter words containing A, M, O and S, https://www.bestwordlist.com/c/a/4/8letterwordswithamos.htm ABDOMENS ABELMOSK ABOMASAL ABOMASUM ABOMASUS ACCOMPTS ACCUSTOM ACOSMISM ACOSMIST ACRONYMS ACROSOME ACROTISM ADENOMAS ADMONISH AGAMOIDS AGAMONTS AGNOMENS AGONISMS ALAMODES ALBUMOSE ALGORISM ALLONYMS ALMONERS ALODIUMS AMAKHOSI AMARONES AMATIONS AMBEROUS AMBOINAS AMBOYNAS AMBROIDS AMBROSIA AMEIOSES AMEIOSIS AMIDMOST AMIDONES AMITOSES AMITOSIS AMMONALS AMMONIAS AMNIOTES AMOKURAS AMORISMS AMORISTS AMOROSAS AMOROSOS AMORTISE AMOSITES AMOTIONS AMPHORAS AMPOULES AMYLOIDS AMYLOSES ANEMONES ANEMOSES ANEMOSIS ANGIOMAS ANGSTROM ANIMATOS ANONYMAS ANOSMIAS ANTISMOG ANTONYMS APHORISM APOMICTS APOMIXES APOMIXIS APOTHEMS ARMHOLES ARMLOADS ARMLOCKS ARMOIRES ARMORERS ARMORIES ARMORIST ASTOMOUS ATAMASCO ATEMOYAS ATMOLYSE ATOMISED ATOMISER ATOMISES ATOMISMS ATOMISTS ATOMIZES ATROPISM AUSFORMS AUTOMATS AUTONYMS AUTOSOME AXONEMES AXOPLASM BABUDOMS BACKMOST BAGWORMS BAMBINOS BARMPOTS BARROOMS BIGAMOUS BIMANOUS BIOPLASM BIRAMOSE BIRAMOUS BLASTOMA BOATSMAN BOATSMEN BOHEMIAS BOMBARDS BOMBASTS BOMBAXES BOMBORAS BONAMIAS BONDSMAN BOYARISM BROMATES BUMBOATS BUMMALOS CABOMBAS CACONYMS CALOMELS CAMARONS CAMBOGES CAMBOOSE CAMCORDS CAMELOTS CAMISADO CAMISOLE CAMOGIES CAMOODIS CAMORRAS CAMPHOLS CAMPHORS CAMPIONS CAMPONGS CAMPOUTS CAMSHOCH CAMSTONE CAMWOODS CAPSOMER CAROMELS CASCHROM CASEWORM CATWORMS CAULOMES CEMBALOS CHAMISOS CHLOASMA CLAMOURS COADMITS COAMINGS COASSUME COCKSMAN COCOMATS COCOYAMS COMAKERS COMATIKS COMATOSE COMITIAS COMMANDS COMPACTS COMPAGES COMPANDS COMPARES COMPARTS COMPEARS COMRADES COPROSMA CORPSMAN COSMICAL COSTMARY CRAMBOES CRAMOISY CRAMPONS CREMONAS CROMACKS CROSSARM CYMBALOS CZARDOMS DAEMONES DAIMOKUS DAIMONES DAMBRODS DAMFOOLS DAMOISEL DAMOSELS DAMOZELS DARKSOME DAYROOMS DEMAGOGS DIADROMS DIAMONDS DIGAMOUS DIORAMAS DIPLOMAS DOCIMASY DOLMADES DOMAINES DOMESDAY DONATISM DOOMSDAY DOOMSMAN DOORMATS DOORSMAN DORMANTS DRAMSHOP EARLDOMS EARWORMS EASTMOST EMBRASOR ENAMOURS EPISOMAL EROTEMAS EXOPLASM FAMOUSED FAMOUSES FAMOUSLY FASCISMO FEARSOME FIBROMAS FLAYSOME FLEASOME FLOTSAMS FOAMIEST FOAMINGS FOAMLESS FOILSMAN FORAMENS FOREARMS FOREMAST FORMANTS FORMATES FORMICAS FORMULAS FOUMARTS FROMAGES FUMADOES GAMBADOS GAMBESON GAMBOGES GAMESHOW GAMESOME GAMMOCKS GASIFORM GAWMOGES GEOMANTS GLADSOME GLAMOURS GOADSMAN GOADSMEN GODDAMNS GOMERALS GOOMBAHS GOOMBAYS GOPURAMS GORAMIES GORMANDS GOSSAMER GOURAMIS GOWNSMAN GRANNOMS GROGRAMS HADROMES HALIDOMS HALIMOTS HALOUMIS HAMBONES HAMMOCKS HAMULOSE HAMULOUS HANDSOME HARMOSTS HARMOSTY HEADMOST HEALSOME HEMAGOGS HEMIOLAS HEMOSTAT HOASTMAN HOASTMEN HOGMANES HOISTMAN HOLYDAMS HOMAGERS HOMESTAY HORSEMAN HOUSEMAN HYDROMAS HYGROMAS IMPASTOS INFAMOUS INSOMNIA IOTACISM IPOMOEAS ISOAMYLS ISOCHASM ISOGAMIC ISOGRAMS JAMBONES JAMBOOLS JARLDOMS JOBNAMES KAMOTIKS KAMOTIQS KAMPONGS KOMATIKS KOMISSAR LABORISM LACONISM LAMINOSE LAMINOUS LAMPIONS LAMPOONS LAMPPOST LARKSOME LEUCOMAS LEUKOMAS LIMACONS LOAMIEST LOAMLESS LOCALISM LOCKRAMS LOCKSMAN LODESMAN LOFTSMAN LORDOMAS LOYALISM LUMBAGOS MACARONS MACHISMO MACHOISM MACHZORS MACULOSE MADDOCKS MADHOUSE MADISONS MADONNAS MADOQUAS MADRONAS MADRONES MADRONOS MADWORTS MADZOONS MAESTOSO MAESTROS MAFIOSOS MAGALOGS MAGNETOS MAGNOXES MAHJONGS MAHONIAS MAILLOTS MAILSHOT MAINOURS MAINTOPS MAJORATS MALICHOS MALISONS MALODORS MALPOSED MALTOSES MAMELONS MAMMOCKS MAMMOTHS MAMPOERS MANDIOCS MANDOLAS MANDORAS MANGEAOS MANGOLDS MANHOLES MANHOODS MANIHOCS MANIHOTS MANIOCAS MANITOUS MANNOSES MANROPES MANSIONS MANSONRY MANSWORN MAORMORS MARABOUS MARCATOS MARCONIS MARGOSAS MARIPOSA MARKHORS MARMOSES MARMOSET MARPLOTS MARRANOS MARSPORT MASCARON MASHLOCH MASONING MASONITE MASOOLAH MASSICOT MASSOOLA MASTICOT MASTODON MASTOIDS MATADORS MATELOTS MATOOKES MATTOCKS MATTOIDS MATZOONS MAUSOLEA MAYORESS MAYPOLES MEACOCKS MEGADOSE MEGAFOGS MEGALOPS MEGAPODS MEGARONS MEGATONS MELANOUS MELODIAS MENAZONS MENORAHS MERCADOS MEROPIAS MESOCARP MESOGLEA MESOSAUR MESOZOAN METASOMA MIASMOUS MINEOLAS MINORCAS MIRADORS MISALLOT MISATONE MISLABOR MISOGAMY MOANINGS MOBCASTS MOCASSIN MOCCASIN MOCHILAS MOCKAGES MODALISM MODALIST MODULARS MOHICANS MOINEAUS MOJARRAS MOLASSES MOLECAST MOLLUSCA MONACIDS MONADISM MONARCHS MONARDAS MONASTIC MONAXONS MONDAINS MONERANS MONILIAS MONOTASK MONSTERA MONTAGES MONTANES MONTANTS MOOKTARS MOONSAIL MOORAGES MOPHEADS MORAINES MORALISE MORALISM MORALIST MORASSES MORDANTS MORMAORS MORPHIAS MORRHUAS MORTSAFE MOSASAUR MOSCATOS MOSCHATE MOSHAVIM MOSSBACK MOSSLAND MOSTWHAT MOULAGES MOUSAKAS MOUSEMAT MOUSEPAD MOUSSAKA MOVABLES MOVIOLAS MOZETTAS MUTATORS MYELOMAS MYOBLAST MYOGRAMS MYSTAGOG NABOBISM NARCOMAS NEOPLASM NEUROMAS NOMADIES NOMADISE NOMADISM NOMARCHS NOMINALS NONMEATS NOTAEUMS OATMEALS OBEAHISM OCCAMIES OFFRAMPS OGHAMIST OILCAMPS OMNIANAS OMPHALOS ONANISMS ONOMASTS ONSTREAM OOGAMIES OOGAMOUS OOMIACKS OPSIMATH ORALISMS ORGANISM ORGANUMS ORGASMED ORGASMIC ORIGAMIS OSMIATES OSMUNDAS OSSARIUM OSTEOMAS OSTMARKS OSTOMATE OTTOMANS OUTBEAMS OUTNAMES OUTSHAME OUTSMART OVERARMS OVERMANS OVERMAST OVERSMAN OVERSWAM PALMTOPS PAMPEROS PAMPOENS PANTOUMS PAPADOMS PARONYMS PAROSMIA PAROXYSM PASHADOM PASTROMI PHANTOMS PLASMOID PLASMONS PLAYSOME PLEONASM PLEROMAS POLYGAMS POLYOMAS POMATOES POMATUMS POMPANOS POPADUMS POSTGAME POSTMARK PROGRAMS PROSAISM PROSEMAN PROSOMAL PROSOMAS PSALMODY PSAMMONS PTOMAINS RACEMOSE RACEMOUS RAGWORMS RAMOSELY RAMOSITY RAMOUSLY RAMPIONS RAMPOLES RAMSHORN RAMULOSE RAMULOUS RANSOMED RANSOMER REARMOST REMOVALS RHABDOMS RHAMNOSE ROADSMAN ROADSMEN ROAMINGS ROMAIKAS ROMAINES ROMANCES ROMANISE ROMANZAS ROMAUNTS ROMNEYAS ROSARIUM ROSEMARY ROSHAMBO ROYALISM SAGAMORE SAILROOM SAINTDOM SALAMONS SALEROOM SALMONET SALMONID SAMOVARS SAMOYEDS SAMSHOOS SANDWORM SANGOMAS SARCOMAS SCAMMONY SCARMOGE SCLEROMA SCOLIOMA SCOTOMAS SCOTOMIA SCREAMOS SEADROME SEAFOAMS SEAMOUNT SEAWOMAN SEAWOMEN SEAWORMS SEMICOMA SEMINOMA SEMIOVAL SEMOLINA SESAMOID SFUMATOS SHAHDOMS SHAMOSIM SHAMOYED SHAMPOOS SHAMROCK SHOREMAN SHORTARM SIMONIAC SJAMBOKS SLALOMED SLALOMER SMALLBOY SMALLPOX SMOKABLE SMORZATO SODAMIDE SOLANUMS SOLARISM SOLARIUM SOLATIUM SOMATISM SOMATIST SOMEDEAL SOMEGATE SOMEWAYS SOMEWHAT SOMNIATE SONARMAN SONARMEN SONOGRAM SOULMATE SOUNDMAN SOYMEALS SPAMBOTS SPANWORM SQUAMOSE SQUAMOUS STAMPEDO STARDOMS STASIMON STEATOMA STOCKMAN STOMACHS STOMACHY STOMACKS STOMATAL STOMATES STOMATIC STOMODEA STOREMAN STRAMONY STROAMED STROMATA SUBATOMS SUBIMAGO SWORDMAN SYCAMORE SYMPODIA SYMPOSIA TAMARAOS TAMBOURS TAMPIONS TAPROOMS TEAROOMS TELAMONS TERAOHMS THYMOMAS TINAMOUS TOADYISM TOKAMAKS TOKOMAKS TOMATOES TOMBACKS TOMBOLAS TONEARMS TOPMASTS TOTALISM TOWNSMAN TOXEMIAS TRANSOMS TRITOMAS TSARDOMS TWASOMES TZARDOMS UNFAMOUS UNWOMANS UROGRAMS VAMOOSED VAMOOSES VAMOSING VASIFORM VASOTOMY VOCALISM VOLTAISM WADMOLLS WAILSOME WAMEFOUS WASHROOM WAXWORMS WOLFRAMS WOMANISE WOMANISH WOMANISM WOMANIST WOMMERAS WOODSMAN WOOMERAS WORMCAST YAHOOISM YAWNSOME ZAMARROS ZAMOUSES ZIMOCCAS ZYMOSANS