There are 501 thirteen-letter words containing 3A, https://www.bestwordlist.com/c/a/3/13letterwordswithaaa.htm ABSQUATULATED ABSQUATULATES ABSTRACTIONAL ACADEMICALISM ACARIDOMATIUM ACARODOMATIUM ACATAMATHESIA ACCIACCATURAS ACCLIMATATION ACETAZOLAMIDE ACHROMATOPSIA ACQUAINTANCES ACROBATICALLY ACTUALISATION ACTUALIZATION ADAPTABLENESS ADAPTATIONIST ADIABATICALLY ADIATHERMANCY ADVANTAGEABLE AERODYNAMICAL AGALMATOLITES AGATHODAIMONS AGGRADATIONAL AGGRAVATINGLY AGGREGATIONAL AIRCRAFTWOMAN ALGEBRAICALLY ALPHABETARIAN AMALGAMATIONS AMARANTACEOUS AMBASSADORIAL AMINOACIDURIA AMPHIBLASTULA AMPHISTOMATAL AMPHITHEATRAL AMYGDALACEOUS ANACATHARTICS ANAEROBICALLY ANAGRAMMATISE ANAGRAMMATISM ANAGRAMMATIST ANAGRAMMATIZE ANALPHABETICS ANALPHABETISM ANALYSABILITY ANALYZABILITY ANAPHORICALLY ANAPHRODISIAC ANAPHRODISIAS ANAPHYLACTOID ANASTIGMATISM ANATHEMATICAL ANATHEMATISED ANATHEMATISES ANATHEMATIZED ANATHEMATIZES ANATOMISATION ANATOMIZATION ANENCEPHALIAS ANGIOSARCOMAS ANIMALISATION ANIMALIZATION ANOMALISTICAL ANTAGONISABLE ANTAGONIZABLE ANTASTHMATICS ANTHRANILATES ANTIAIRCRAFTS ANTIALIASINGS ANTIAPARTHEID ANTIASTHMATIC ANTIBACTERIAL ANTICATALYSTS ANTICIPATABLE ANTICLASSICAL ANTICOAGULANT ANTIDIARRHEAL ANTIHALATIONS ANTIMACASSARS ANTIMALARIALS ANTIMARIJUANA ANTINARRATIVE ANTINATIONALS ANTINAUSEANTS ANTIPARALLELS ANTIPARASITIC ANTIQUITARIAN ANTIRADIATION ANYTHINGARIAN APATHETICALLY APATOSAURUSES APHRODISIACAL APLANATICALLY APLANOGAMETES APOCALYPTICAL APOCATASTASES APOCATASTASIS APPEALABILITY APPELLATIONAL APPERTAINANCE APPOGGIATURAS AQUACEUTICALS ARABICISATION ARABICIZATION ARACHNOPHOBIA ARAEOMETRICAL ARBITRATIONAL ARCHAEOBOTANY ARCHIDIACONAL ARCHIPELAGIAN ARCHOSAURIANS ARITHMOMANIAS ARMAMENTARIUM AROMATISATION AROMATIZATION ASCERTAINABLE ASCERTAINABLY ASPARAGINASES ASSASSINATING ASSASSINATION ASSASSINATORS ASSOCIATIONAL ASTACOLOGICAL ASTHMATICALLY ASTRAPOPHOBIA ASTROCYTOMATA ASTRONAUTICAL ATAVISTICALLY ATHEMATICALLY ATORVASTATINS ATTAINABILITY ATTRACTANCIES AUTHORITARIAN AUTOCATALYSED AUTOCATALYSES AUTOCATALYSIS AUTOCATALYTIC AUTOCATALYZED AUTOCATALYZES AUTOGRAPHICAL AUTOMAGICALLY AUTOMATICALLY AUTORADIOGRAM AUTOTOXAEMIAS AVAILABLENESS AVOCATIONALLY AXIOMATICALLY BACCALAUREATE BACCHANALIANS BACKWARDATION BALKANISATION BALKANIZATION BALLANWRASSES BALLETOMANIAS BANALISATIONS BANALIZATIONS BANCASSURANCE BARAESTHESIAS BARBARIANISMS BARBARISATION BARBARIZATION CABBALISTICAL CACOGRAPHICAL CAESAROPAPISM CALCULATIONAL CANALICULATED CANALISATIONS CANALIZATIONS CANCELLARIATE CANTHAXANTHIN CAPACITATIONS CARAVANSARAIS CARAVANSARIES CARAVANSERAIS CARBAMAZEPINE CARDINALATIAL CARDINALITIAL CARRAGHEENANS CASUALISATION CASUALIZATION CATABOLICALLY CATALYTICALLY CATAMOUNTAINS CATATONICALLY CATHARTICALLY CELIBATARIANS CHALAZOGAMIES CHARLATANICAL CHARLATANISMS CHARLATANRIES CHATEAUBRIAND COADAPTATIONS COASTGUARDMAN CONCANAVALINS CONTRALATERAL CYANOACRYLATE CYANOBACTERIA DAMAGEABILITY DATAVEILLANCE DECALCOMANIAS DIAPHRAGMATIC DIPSOMANIACAL DISADVANTAGED DISADVANTAGES DISAPPEARANCE DISCAPACITATE DRAMATISATION DRAMATIZATION DRAMATURGICAL EGOMANIACALLY EMBARRASSABLE ENCEPHALALGIA ENCEPHALOMATA EQUALITARIANS EUPHAUSIACEAN EUTHANASIASTS EXAMINATIONAL EXCLAMATIONAL EXTRAGALACTIC EXTRAVAGANCES EXTRAVAGANTLY EXTRAVAGANZAS EXTRAVAGATING EXTRAVAGATION EXTRAVASATING EXTRAVASATION EXTRAVASCULAR FANATICALNESS FANFARONADING FANTASMICALLY FANTASTICALLY FANTASTICATED FANTASTICATES FARADISATIONS FARADIZATIONS FARAWAYNESSES FLAGELLOMANIA GALACTAGOGUES GALACTORRHEAS GALACTORRHOEA GALACTOSAEMIA GALACTOSAEMIC GALACTOSAMINE GALACTOSEMIAS GALACTOSIDASE GALVANISATION GALVANIZATION GALVANOPLASTY GIGANTOMACHIA GRADATIONALLY GRAMMATICALLY GRANDPARENTAL GRAVITATIONAL GYNAECOMASTIA HAEMANGIOMATA HAEMATOBLASTS HANDCRAFTSMAN HAPHAZARDNESS HAPHAZARDRIES HUMANITARIANS HYPOCALCAEMIA HYPONATRAEMIA IMAGINATIONAL INADAPTATIONS INCANTATIONAL INCAPACITANTS INCAPACITATED INCAPACITATES INCARNATIONAL INEGALITARIAN INTRACAPSULAR INTRACAVITARY INTRAGALACTIC INTRANATIONAL INTRAPARIETAL INTRAVASATION INTRAVASCULAR JALOALLOFANES KATABOLICALLY KATHAREVOUSAS LABANOTATIONS LABEFACTATION LABIALISATION LABIALIZATION LACKADAISICAL LACTATIONALLY LALLAPALOOZAS LAMPADEPHORIA LANDGRAVIATES LOLLAPALOOSAS LOLLAPALOOZAS MACARONICALLY MACHIAVELIANS MACHIAVELLIAN MACROCEPHALIA MACRODIAGONAL MAGISTRATICAL MAJOLICAWARES MAJORITARIANS MALACOLOGICAL MALACOSTRACAN MALADAPTATION MALADAPTIVELY MAMMAPLASTIES MANAGEABILITY MANAGERIALISM MANAGERIALIST MANIPULATABLE MARSUPIALIANS MASSARANDUBAS MASSERANDUBAS MATERFAMILIAS MATHEMATICIAN MATRIARCHATES MAXILLOFACIAL MEGALOCARDIAS MEGALOMANIACS MEGALOSAURIAN MEGASPORANGIA METACERCARIAE METACERCARIAL METACERCARIAS METALANGUAGES METAMATERIALS METANARRATIVE MISAPPRAISALS NANOMATERIALS NARCOANALYSES NARCOANALYSIS NASALISATIONS NASALIZATIONS NEOGRAMMARIAN NONAGENARIANS NONANALYTICAL NONANATOMICAL NONAPPEARANCE NONMAMMALIANS NONMANAGERIAL OSTEOMALACIAL OSTEOMALACIAS OXALOACETATES PAEDIATRICIAN PAGANISATIONS PAGANIZATIONS PALAEOBOTANIC PALAEOCLIMATE PALAEOGRAPHER PALAEOGRAPHIC PALATABLENESS PANAESTHESIAS PANDEMONIACAL PANGRAMMATIST PANOPHTHALMIA PANORAMICALLY PANPHARMACONS PAPAPRELATIST PAPAVERACEOUS PARABOLANUSES PARABOLICALLY PARACYANOGENS PARADOXICALLY PARAESTHESIAS PARAGNATHISMS PARAGOGICALLY PARAGRAPHICAL PARAGRAPHISTS PARAINFLUENZA PARALANGUAGES PARALEIPOMENA PARALLACTICAL PARALLELOGRAM PARALYSATIONS PARALYTICALLY PARALYZATIONS PARAMAGNETISM PARANORMALITY PARAPHERNALIA PARAPHRASABLE PARAPOPHYSIAL PARAPSYCHICAL PARAQUADRATES PARARESCUEMAN PARASEXUALITY PARASITAEMIAS PARASITICALLY PARASITICIDAL PARLIAMENTARY PASIGRAPHICAL PATERFAMILIAS PATRIARCHALLY PATRIARCHATES PENTABARBITAL PERMANGANATES PHALANSTERIAN PHANTASMAGORY PHANTASMALIAN PHANTASMALITY PHARISAICALLY PHARMACOPEIAL PHARMACOPEIAS PHARMACOPOEIA PIPIWHARAUROA PLASMODESMATA POSTLAPSARIAN PRAGMATICALLY PREADAPTATION PRELAPSARIANS PROPAGATIONAL QUADRAGESIMAL QUADRAPLEGIAS QUADRATICALLY QUADRILATERAL RADIALISATION RADIALIZATION RADIOACTIVATE RAREFACTIONAL RAZZAMATAZZES READAPTATIONS REAPPEARANCES RHABDOMYOMATA RHADAMANTHINE SACRALISATION SACRALIZATION SACRAMENTALLY SALAMANDRIANS SALAMANDROIDS SALUTATORIANS SANITARIANISM SARCASTICALLY SARSAPARILLAS SATANICALNESS SATANOPHANIES SATANOPHOBIAS SATURNALIANLY SCLEROMALACIA SEXAGENARIANS SQUANDERMANIA STAGECOACHMAN STALACTITICAL STALAGMITICAL STRAIGHTAWAYS SUBAPPEARANCE SUBLAPSARIANS SUBPARAGRAPHS SUPRANATIONAL SUPRARATIONAL SYNALLAGMATIC TACHYPHRASIAS TANTALISATION TANTALIZATION TARAMASALATAS TARATANTARAED TARTARISATION TARTARIZATION TETRADRACHMAS THALAMIFLORAL THALASSAEMIAS THALASSAEMICS THALASSOCRACY THALASSOCRATS THALATTOCRACY THANATOGRAPHY THANATOPHOBIA THAUMATOLATRY THEATROMANIAS TOBACCANALIAN TOTALITARIANS TRADESCANTIAS TRANSACTIONAL TRANSAMINASES TRANSATLANTIC TRANSLATIONAL TRANSLATORIAL TRANSNATIONAL TRANSVALUATED TRANSVALUATES TRAUMATICALLY TRAUMATONASTY TRUSTAFARIANS TURANGAWAEWAE ULTRAFAMILIAR ULTRAMARATHON ULTRANATIONAL ULTRARADICALS ULTRARATIONAL UNASSUAGEABLE UNGAINSAYABLE UNGRAMMATICAL UNMACADAMISED UNMACADAMIZED UNSALVAGEABLE UNSALVAGEABLY UNWARRANTABLE UNWARRANTABLY VACATIONLANDS VALUATIONALLY VANDALISATION VANDALIZATION VARIATIONALLY VOCABULARIANS