There are 606 ten-letter words containing A, E and 3S, https://www.bestwordlist.com/c/a/5/10letterwordswithaesss.htm ABSCESSING ABSTRUSEST ABSURDNESS ACCESSIONS ACHINESSES ACIDNESSES ADDRESSEES ADDRESSERS ADDRESSORS AEROBUSSES AESTHESIAS AGEDNESSES AGGRESSORS AIRINESSES ALBINESSES ALMSHOUSES ALPHOSISES AMASSMENTS AMBASSAGES ANCESTRESS ANSWERLESS ANTISEPSES ANTISEPSIS ANTISTRESS APOSTASIES ARCHNESSES ARIDNESSES ARTINESSES ASBESTOSES ASBESTOSIS ASBESTUSES ASCARIASES ASCENSIONS ASCOSPORES ASHINESSES ASPERSIONS ASPERSOIRS ASSAULTERS ASSEMBLERS ASSEMBLIES ASSERTIONS ASSESSABLE ASSESSMENT ASSISTANCE ASSOCIATES ASSOILZIES ASSONANCES ASSUETUDES ASSURANCES ASTONISHES ASTUTENESS AUGUSTNESS AUTOBUSSES AVERSENESS AVIDNESSES AWAYNESSES BABESIASES BABESIASIS BABESIOSES BABESIOSIS BAGASSOSES BAKSHISHES BALDNESSES BALLSINESS BANDPASSES BARENESSES BARONESSES BASELESSLY BASENESSES BASSNESSES BIASNESSES BONASSUSES BONILASSES BRASHINESS BRASSERIES BRASSIERES BRASSINESS BRASSWARES BREASTLESS BYSSACEOUS CAESARISMS CAGINESSES CAGYNESSES CAKINESSES CALMNESSES CAMPNESSES CANONESSES CANVASSERS CAPSULISES CARESSINGS CASHSPIELS CASSAREEPS CASSEROLES CASSIMERES CASSINGLES CASSONADES CASSOULETS CASUALISES CASUALNESS CATASTASES CATERESSES CESSATIONS CHAISELESS CHAPPESSES CHASSEPOTS CHASTENESS CHASTISERS CHAUSSURES CLASSICISE CLASSIFIES CLASSINESS CLASSMATES COARSENESS COASSISTED COSEISMALS COWGRASSES CREASELESS CROSSBEAMS CROSSHEADS CUTGRASSES DAFTNESSES DAMPNESSES DANKNESSES DARKNESSES DATABUSSES DEADNESSES DEAFNESSES DEARNESSES DECUSSATES DEGAUSSERS DEMITASSES DESSYATINS DIASTALSES DISHDASHES DISMALNESS DISPERSALS DISPLEASES DISPRAISES DISSIPATES DISSUADERS DISSUASIVE DOGARESSAS DRABNESSES DRESSMAKES DYSPEPSIAS DYSTHESIAS EASINESSES ECDYSIASTS ECOSSAISES ECSTASISED ECSTASISES ECSTASIZES EELGRASSES EMBASSADES EMBASSAGES EMISSARIES EMPHASISES EPISTASIES ESCAPELESS ESSAYETTES ESSAYISTIC ESSENTIALS EYEGLASSES FAINNESSES FAIRNESSES FAMOUSNESS FANTASISES FASCITISES FASTNESSES FLASHINESS FLATNESSES FRICASSEES GALLEASSES GALLIASSES GALLISISES GAMENESSES GAMINESSES GAMYNESSES GARISHNESS GASHLINESS GASTHAUSES GASTNESSES GESSAMINES GIANTESSES GLADNESSES GLASSHOUSE GLASSIFIES GLASSINESS GLASSWARES GLISSADERS GLOSSARIES GOOSEGRASS GRASSINESS GRAYNESSES GREASELESS GREASINESS HAIRLESSES HALENESSES HALFNESSES HANDPASSES HARDNESSES HARNESSERS HASHEESHES HAZINESSES HEMOSTASES HEMOSTASIS HOARSENESS HYPOSTASES INSANENESS INSPISSATE ISOMERASES ISOSEISMAL ISOSTACIES ISOSTASIES JADISHNESS JASPERISES JESSAMINES JESSERANTS KAISERISMS LACINESSES LADYNESSES LAMENESSES LANDMASSES LANKNESSES LASERDISCS LASERDISKS LASSITUDES LATENESSES LAVISHNESS LAZINESSES LEANNESSES LOPGRASSES LOSSMAKERS MALENESSES MARASMUSES MARQUESSES MARSHINESS MASSACRERS MASSPRIEST MASSYMORES MASTERLESS MASTHOUSES MASTITISES MATELASSES MATGRASSES MATINESSES MATTRASSES MATTRESSES MAYORESSES MAZINESSES MEANNESSES MEASLINESS MESCALISMS MESOBLASTS MESOPAUSES MESSAGINGS MESSALINES MESSIANISM METASTASES METASTASIS MISADDRESS MISADVISES MISASSAYED MISASSUMED MISASSUMES MISBIASSED MISBIASSES MISCLASSED MISCLASSES MISFEASORS MISHMASHES MISHUGASES MISPHRASES MISPLEASES MISPRAISES MISSHAPERS MOLASSESES MORASSIEST MUSQUASHES MUSSITATES NABOBESSES NAFFNESSES NAIFNESSES NAISSANCES NEARNESSES NEATNESSES NEWSSTANDS NONCLASSES NUTGRASSES OAFISHNESS OAKINESSES OASTHOUSES OFFSEASONS OGANESSONS ORATRESSES OSSIFRAGES OSTRACISES OUTCLASSES OVALNESSES OVERASSESS OVERPASSES PACKNESSES PAILLASSES PALENESSES PALLIASSES PASSAMENTS PASSEMENTS PASSENGERS PASSEPIEDS PASSERINES PASSIVATES PASTELISTS PASTNESSES PATISSIERS PATTRESSES PHRASELESS PHYSALISES PINGRASSES PIPSISSEWA PLAYBUSSES POSTHASTES POSTSEASON PRAISELESS PREASSIGNS PREASSURES PRESEASONS PRESSGANGS PRESSMARKS PRUSSIATES PUISSANCES QUEASINESS RACINESSES RAILBUSSES RAKISHNESS RANKNESSES RANSOMLESS RAPTNESSES RARENESSES RASHNESSES RASTERISES RAYGRASSES REALNESSES REASONLESS REASSESSED REASSESSES REASSURERS REASTINESS REDRESSALS REPASSAGES RESISTANTS RESSALDARS RIBGRASSES RIVALESSES ROTGRASSES RYEGRASSES SABBATISES SACRALISES SACREDNESS SACRISTIES SADDLELESS SAFENESSES SAGANASHES SAGENESSES SAILFISHES SAILORLESS SAINTESSES SALESGIRLS SALESROOMS SALLOWNESS SALTBUSHES SALTFISHES SALTNESSES SAMENESSES SAMNITISES SANDFISHES SANDSTONES SANENESSES SANITISERS SAPSUCKERS SARCOSOMES SARGASSOES SASSOLITES SATIRISERS SATISFICES SATISFIERS SATYRESSES SATYRIASES SAUCERLESS SAUSSURITE SAVAGENESS SAVINGNESS SAVORINESS SAVOURLESS SAWBONESES SAWGRASSES SCABBINESS SCABIOUSES SCAITHLESS SCANTINESS SCARCENESS SCARFISHES SCATHELESS SCATTINESS SCENARISES SCENARISTS SCHNAPPSES SCLERIASES SCLERIASIS SEAGRASSES SEAMLESSLY SEAMSTRESS SEARCHLESS SEAREDNESS SEARNESSES SEASICKEST SEASONINGS SEASONLESS SEASTRANDS SEDATENESS SENESCHALS SENSATIONS SENSUALISE SENSUALISM SENSUALIST SERASKIERS SERIALISES SERIALISMS SERIALISTS SERRATUSES SEXUALISES SEXUALISMS SEXUALISTS SHABBINESS SHADBUSHES SHADOWLESS SHAGGINESS SHATOOSHES SHEATHLESS SHOALINESS SHORTARSES SIGNALISES SISERARIES SKAITHLESS SKANKINESS SKIASCOPES SLABBINESS SLABSTONES SLANGINESS SLAPDASHES SLASHFESTS SLEAZINESS SLOGANISES SMALMINESS SMARMINESS SMARTARSES SMARTASSED SMARTASSES SMASHEROOS SMEARCASES SMEARINESS SMIERCASES SNAKESKINS SNAPPINESS SNAZZINESS SNEAKINESS SNEAKSBIES SNOWSCAPES SNOWSNAKES SOAPDISHES SOAPFISHES SOAPSTONES SOCIALISES SOCIALNESS SOFTSCAPES SOMASCOPES SOUTHEASTS SPACESHIPS SPACESUITS SPARAXISES SPARSENESS SPARSITIES SPETSNAZES SPIRASTERS SPLASHIEST SPYGLASSES SPYMASTERS SQUABASHES SQUARENESS SQUASHIEST STABILISES STABLENESS STABLISHES STAIRCASES STAIRSTEPS STALKINESS STANCHLESS STANCHNESS STANDISHES STARFISHES STAROSTIES STARRINESS STARSHINES STARSTONES STATUSIEST STEADINESS STEAMINESS STEAMSHIPS STEGOSAURS STERNFASTS STEWARDESS STONECASTS STRAITNESS STRAMASHES STREAMLESS SUBCHASERS SUBCLASSED SUBCLASSES SUBCLAUSES SUBSAMPLES SUBSTANCES SUBSTRATES SUBVERSALS SUCRALOSES SUGARINESS SULCALISES SULFATASES SUMMARISES SUNGLASSED SUNGLASSES SUPERCLASS SUPERGRASS SUPERSALES SUPERSALTS SUPERSAURS SUPERSTARS SURMASTERS SURPASSERS SUSCITATES SUSTAINERS SUSURRATES SWAMPINESS SWANKINESS SWARTHNESS SWEATINESS SWEATSHOPS SWEATSUITS SWEETGRASS SYLLABISES SYLLABUSES SYNAERESES SYNAERESIS SYNAPTASES SYNASTRIES TALLNESSES TAMENESSES TARTNESSES TASSELIEST TAUTNESSES TEARGASSES TESSELATES TESSERACTS TESSITURAS THATNESSES TIGHTASSES TIMEPASSES TITANESSES TOASTINESS TRANSFUSES TRANSGRESS TRANSPOSES TRANSVESTS TRASHINESS TRESPASSED TRESPASSER TRESPASSES TROUSSEAUS UNASSISTED UNEASINESS UNSAFENESS USABLENESS VAINNESSES VASSALAGES VASSALISED VASSALISES VASSALIZES VASSALRIES VASTNESSES VICARESSES VISAGISTES VISUALISES VOTARESSES WAITRESSES WARDRESSES WARINESSES WARMNESSES WASHERLESS WASHHOUSES WASSAILERS WASTNESSES WAVINESSES WAXINESSES WEAKNESSES WHATNESSES WINDLASSES YEASTINESS ZANINESSES