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