There are 476 twelve-letter words containing 2A, M, O and T, https://www.bestwordlist.com/c/a/5/12letterwordswithaamot.htm
ABANDONMENTS ABOMINATIONS ACARIDOMATIA ACARODOMATIA ACCLAMATIONS
ACCLIMATIONS ACCOMMODATED ACCOMMODATES ACCOMMODATOR ACCOMPANISTS
ACCOMPANYIST ACCUMULATION ACCUMULATORS ACETONAEMIAS ACHROMATISED
ACHROMATISES ACHROMATISMS ACHROMATIZED ACHROMATIZES ACROAMATICAL
ACUMINATIONS ADOPTIANISMS ADUMBRATIONS AEROMAGNETIC AFFIRMATIONS
AGALMATOLITE AGAMOGENETIC AGATHODAIMON AGGLOMERATED AGGLOMERATES
AGROSTEMMATA ALEMBICATION ALIMENTATION ALSTROEMERIA ALTALTISSIMO
AMALGAMATION AMALGAMATORS AMAZONSTONES AMBULATORIES AMBULATORILY
AMELIORATING AMELIORATION AMELIORATIVE AMELIORATORS AMELIORATORY
AMETABOLISMS AMIANTHOIDAL AMITOTICALLY AMMONIATIONS AMOBARBITALS
AMONTILLADOS AMORTISATION AMORTIZATION ANASTOMOSING ANATOMICALLY
ANECDOTALISM ANIMATRONICS ANTHOMANIACS ANTIDOGMATIC ANTILEGOMENA
ANTIMETABOLE ANTIMONIATES ANTIROMANTIC ANTITUMOURAL ANTONOMASIAS
ANTONOMASTIC APLANOGAMETE APOCALYPTISM APOCHROMATIC APOTHEGMATIC
APOTROPAISMS APPROXIMATED APPROXIMATES ARAEOMETRIES ARCHAEOMETRY
ARITHMOMANIA AROMATHERAPY AROMATICALLY ARTERIOGRAMS ASSIMILATION
ASSIMILATORS ASSIMILATORY ASTROCOMPASS ASTROCYTOMAS ASTRONOMICAL
ASYMPTOMATIC ASYMPTOTICAL ATHEROMATOUS ATOMISATIONS ATOMIZATIONS
AUGMENTATION AUTOALLOGAMY AUTOMATICITY AUTOMATISING AUTOMATIZING
AUTOSAMPLERS AUTOTOXAEMIA AUTOTOXEMIAS AUXANOMETERS AVITAMINOSES
AVITAMINOSIS AVITAMINOTIC AXIOMATISING AXIOMATIZING AYUNTAMIENTO
BACKCOURTMAN BALLETOMANES BALLETOMANIA BAROMETRICAL BAROTRAUMATA
BEAUMONTAGES BEAUMONTAGUE BIOMATERIALS CALAMITOUSLY CALUMNIATION
CALUMNIATORS CALUMNIATORY CAMPHORATING CAPROLACTAMS CARTOMANCIES
CATAMOUNTAIN CAUSATIONISM CHROMATOGRAM CHROMATOPSIA CHROMONEMATA
CLEPTOMANIAC CLEPTOMANIAS COCKAMAMIEST COMANAGEMENT COMMENTARIAL
COMMENTARIAT COMMISSARIAT COMPAGINATED COMPAGINATES COMPANIONATE
COMPARATISTS COMPARATIVES COMPLAINANTS COMPLANATION CONCLAMATION
CONTAMINABLE CONTAMINANTS CONTAMINATED CONTAMINATES CONTAMINATOR
CRYPTOGAMIAN DACTYLOGRAMS DEAMBULATORY DEAMINATIONS DECLAMATIONS
DEFAMATORILY DELAMINATION DEMARCATIONS DEMARKATIONS DEMOCRATICAL
DESQUAMATION DESQUAMATORY DIATOMACEOUS DIAZOMETHANE DIPLOMATICAL
DISCLAMATION DOGMATICALLY ECOTARIANISM EMANCIPATION EMANCIPATORS
EMANCIPATORY EMARGINATION EMASCULATION EMASCULATORS EMASCULATORY
EMBARCATIONS EMBARKATIONS EMIGRATIONAL EMPASSIONATE ENTOMOFAUNAE
ENTOMOFAUNAS EPITHALAMION ERGASTOPLASM EROTOMANIACS ESTRAMAZONES
ETHANOLAMINE ETHEROMANIAC ETHEROMANIAS EXAMINATIONS EXANIMATIONS
EXCLAMATIONS EXOPHTHALMIA FACTIONALISM FLAMBOYANTES FLAMBOYANTLY
FLAMMULATION FOOTPLATEMAN FUNAMBULATOR GALACTOMETER GALACTOMETRY
GALACTOSEMIA GALACTOSEMIC GALVANOMETER GALVANOMETRY GAMIFICATION
GAMOPETALOUS GASOMETRICAL GIGANTOMACHY GLAUCOMATOUS GLIOBLASTOMA
GRAMMATOLOGY GYNAECOMASTS GYNAECOMASTY GYNECOMASTIA HAEMATOBLAST
HAEMATOCELES HAEMATOCRITS HAEMATOCRYAL HAEMATOGENIC HAEMATOLOGIC
HAEMATOLYSES HAEMATOLYSIS HAEMATOXYLIC HAEMATOXYLIN HAEMATOXYLON
HAEMOSTASIAS HAEMOSTATICS HAMARTIOLOGY HARBORMASTER HEMANGIOMATA
HEMATOBLASTS HEPATOMEGALY HIEROGRAMMAT HOJATOLESLAM HOJATOLISLAM
HOMOTAXIALLY HUMANISATION HUMANIZATION HYPONATREMIA HYPOTHALAMIC
HYPOTHALAMUS HYSTEROMANIA IMAGINATIONS IMPARKATIONS IMPARTATIONS
IMPASSIONATE IMPASTATIONS IMPERATORIAL IMPLANTATION INANIMATIONS
INFLAMMATION INFLAMMATORY INHALATORIUM INTRACOMPANY KATHAROMETER
KLEPTOMANIAC KLEPTOMANIAS LACHRYMATION LACHRYMATORS LACHRYMATORY
LACRIMATIONS LAMELLATIONS LAMENTATIONS LAPAROTOMIES LIMITATIONAL
MACHAIRODONT MACHICOLATED MACHICOLATES MACHINATIONS MACROCLIMATE
MACRODACTYLS MACRODACTYLY MACROGAMETES MADEFACTIONS MADERISATION
MADERIZATION MAGNETOGRAPH MAGNETOPAUSE MAINTOPMASTS MAINTOPSAILS
MAJORITAIRES MAJORITARIAN MALACOLOGIST MALAKATOONES MALAPROPISTS
MALEFACTIONS MALFORMATION MALVERSATION MAMILLATIONS MAMMALOGISTS
MAMMILLATION MANCIPATIONS MANDUCATIONS MANIPULATION MANIPULATORS
MANIPULATORY MANOMETRICAL MARATHONINGS MARCATISSIMO MARGINATIONS
MARTELLANDOS MASSOTHERAPY MASTICATIONS MASTURBATION MASTURBATORS
MASTURBATORY MATRICULATOR MATRILOCALLY MATURATIONAL MAXIMISATION
MAXIMIZATION MEGALOBLASTS MEGASTARDOMS MEGATONNAGES MELANISATION
MELANIZATION MELANOBLASTS MELODRAMATIC MENINGIOMATA MEPROBAMATES
METAGNATHOUS METALISATION METALIZATION METAPHORICAL METASEQUOIAS
METASOMATISM METATHORACES METATHORACIC METATHORAXES METHANATIONS
METHAQUALONE METRORRHAGIA MICROANALYST MICROANATOMY MICROHABITAT
MINATORIALLY MISALLOCATED MISALLOCATES MISCATALOGED MISCATALOGUE
MOBOCRATICAL MONASTICALLY MONODRAMATIC MONOTHALAMIC MORALISATION
MORALIZATION MORTARBOARDS MORTGAGEABLE MOTIVATIONAL MUTATIONALLY
MYCOBACTERIA MYCOPLASMATA MYSTAGOGICAL MYTHOMANIACS NANOMATERIAL
NATIONALISMS NEMATOBLASTS NEUROANATOMY NOEMATICALLY NOMADISATION
NOMADIZATION NOMENKLATURA NONAROMATICS NONAUTOMATED NONAUTOMATIC
NONCOMBATANT NONMALIGNANT NONMANDATORY NONMATERIALS ONOMASTICIAN
ONOMATOPOEIA ORNAMENTALLY OSTEOMALACIA OSTEOMALACIC OSTEOSARCOMA
OUTMARRIAGES OVERDRAMATIC PAEDOBAPTISM PANCHROMATIC PANTOMIMICAL
PARACETAMOLS PARAMASTOIDS PARASYMBIONT PARATHORMONE PARONOMASTIC
PASTORALISMS PERAMBULATOR PETALOMANIAS PHRAGMOPLAST PHYTOPLASMAS
PIROPLASMATA PLANOGAMETES PLASMOSOMATA PLASTOGAMIES POMEGRANATES
PORISMATICAL PORTMANTEAUS PORTMANTEAUX POTICHOMANIA PRISMATOIDAL
PROCLAIMANTS PROCLAMATION PROCLAMATORY PROGRAMMATIC PROTHALAMION
PROTHALAMIUM PROTONEMATAL PROTOPLASMAL PTERIDOMANIA RACEMISATION
RACEMIZATION RACTOPAMINES RAMENTACEOUS RAMIFICATION RATIONALISMS
REANIMATIONS RECLAMATIONS RHAMPHOTHECA ROMANISATION ROMANIZATION
ROMANTICALLY SALTATIONISM SALTIMBANCOS SALTIMBOCCAS SALVATIONISM
SARCOLEMMATA SARCOMATOSES SARCOMATOSIS SCAPEGOATISM SOMAESTHESIA
SOMATIZATION SOMATOPLASMS SOMATOSTATIN SOMATOTONIAS SOMNAMBULANT
SOMNAMBULATE SPERMATOZOAL SPERMATOZOAN STAKHANOVISM STALACTIFORM
STAPHYLOMATA STEATOMATOUS STEGANOGRAMS STOMACHACHES STOMATODAEUM
SYNAPTOSOMAL TAILORMAKING TAPHONOMICAL TAUROMACHIAN TAUROMACHIES
TECHNOMANIAC TECHNOMANIAS TERATOMATOUS THAUMATOGENY THAUMATOLOGY
THAUMATROPES THEATROMANIA THINGAMABOBS TIMBROMANIAC TIMBROMANIAS
TIMOCRATICAL TOASTMASTERS TOXICOMANIAS TRACHOMATOUS TRAGICOMICAL
TRANSMONTANE TRAUMATOLOGY TRYPANOSOMAL TULIPOMANIAS ULTRACOMPACT
ULTRAMONTANE UNCOMEATABLE UNFATHOMABLE UNFATHOMABLY UNFLAMBOYANT
UNORNAMENTAL UNROMANTICAL WEATHERWOMAN WHATABOUTISM XANTHOMATOUS
ZALAMBDODONT