There are 450 fourteen-letter words containing 3A, https://www.bestwordlist.com/c/a/3/14letterwordswithaaa.htm ABSQUATULATING ACADEMICALISMS ACATAMATHESIAS ACCLIMATATIONS ACCLIMATISABLE ACCLIMATIZABLE ACETAZOLAMIDES ACHONDROPLASIA ACHROMATICALLY ACHROMATOPSIAS ACTUALISATIONS ACTUALIZATIONS ADAPTABILITIES ADAPTATIONALLY ADAPTATIONISTS ADENOCARCINOMA ADIATHERMANOUS ADVANTAGEOUSLY AEROELASTICIAN AEROMECHANICAL AERONAUTICALLY AIRCRAFTSWOMAN ALEXIPHARMAKON ALKALINISATION ALKALINIZATION ALLOPATHICALLY ALLOPATRICALLY ALPHABETARIANS ALPHABETICALLY ALPHAMERICALLY ALPHANUMERICAL ALTITUDINARIAN AMARANTHACEOUS AMBASSADORSHIP AMBASSADRESSES AMBULANCEWOMAN AMINOACIDURIAS AMPHIBLASTULAE ANACARDIACEOUS ANACHRONICALLY ANAGRAMMATICAL ANAGRAMMATISED ANAGRAMMATISES ANAGRAMMATISMS ANAGRAMMATISTS ANAGRAMMATIZED ANAGRAMMATIZES ANALPHABETISMS ANAMNESTICALLY ANAPHRODISIACS ANASTIGMATISMS ANATHEMATICALS ANATHEMATISING ANATHEMATIZING ANATOMISATIONS ANATOMIZATIONS ANGIOSARCOMATA ANIMALISATIONS ANIMALIZATIONS ANTAGONISATION ANTAGONIZATION ANTAPHRODISIAC ANTIARRHYTHMIA ANTIASTHMATICS ANTIBACTERIALS ANTIBARBARUSES ANTICAPITALISM ANTICAPITALIST ANTICHLAMYDIAL ANTICOAGULANTS ANTIDEFAMATION ANTIDIARRHEALS ANTIDIARRHOEAL ANTIHARASSMENT ANTIMANAGEMENT ANTIMETASTATIC ANTINARRATIVES ANTIPARASITICS ANTIPATHETICAL ANTIPHRASTICAL ANTIQUARIANISM ANTIQUITARIANS ANTIRADICALISM ANTISEPARATIST ANYTHINGARIANS APOSEMATICALLY APOTHEGMATICAL APOTROPAICALLY APPERTAINANCES ARABICISATIONS ARABICIZATIONS ARACHNOLOGICAL ARACHNOPHOBIAS ARCHAEBACTERIA ARCHAEOLOGICAL ARCHIDIACONATE ARISTOCRATICAL ARMAMENTARIUMS AROMATHERAPIES AROMATHERAPIST AROMATISATIONS AROMATIZATIONS ASPIRATIONALLY ASSASSINATIONS ASTIGMATICALLY ASTRAPOPHOBIAS ASTRONAVIGATOR ATTAINABLENESS ATTITUDINARIAN AUTHORITARIANS AUTOALLOGAMIES AUTOCATALYSING AUTOCATALYZING AUTOCRATICALLY AUTOMATISATION AUTOMATIZATION AUTORADIOGRAMS AUTORADIOGRAPH AVAILABILITIES AVASCULARITIES AXIOMATISATION AXIOMATIZATION BACCALAUREATES BACKWARDATIONS BALKANISATIONS BALKANIZATIONS BALSAMINACEOUS BANCASSURANCES BARBARISATIONS BARBARIZATIONS BASTARDISATION BASTARDIZATION BATHYGRAPHICAL BATRACHOPHOBIA BIBLIOMANIACAL BOUGAINVILLAEA BRACHYDIAGONAL BREATHARIANISM CAESAROPAPISMS CALLIGRAPHICAL CAMOUFLAGEABLE CAMPANOLOGICAL CAMPANULACEOUS CANCELLARIATES CANTHAXANTHINE CANTHAXANTHINS CAPITALISATION CAPITALIZATION CAPPARIDACEOUS CARAMELISATION CARAMELIZATION CARBAMAZEPINES CARCINOSARCOMA CARDIOVASCULAR CARPOMETACARPI CARTOGRAPHICAL CASTRAMETATION CASUALISATIONS CASUALIZATIONS CATACHRESTICAL CATADIOPTRICAL CATALEPTICALLY CATAPHORICALLY CHAPTALISATION CHAPTALIZATION CHARLATANISTIC CHATEAUBRIANDS COASTGUARDSMAN CYANOACRYLATES CYANOBACTERIAL CYANOCOBALAMIN DATAVEILLANCES DERMATOGRAPHIA DIAGONALISABLE DIAGONALIZABLE DIAGRAMMATICAL DISACCHARIDASE DISADVANTAGING DISAPPEARANCES DISCAPACITATED DISCAPACITATES DRAMATISATIONS DRAMATIZATIONS EGALITARIANISM ENCEPHALALGIAS EPIGRAMMATICAL EUPHAUSIACEANS EXTRACANONICAL EXTRAMARITALLY EXTRAPYRAMIDAL EXTRAVAGANCIES EXTRAVAGATIONS EXTRAVASATIONS FANATICISATION FANATICIZATION FANTASTICALITY FANTASTICATING FANTASTICATION FATALISTICALLY FIBROSARCOMATA FLAGELLOMANIAC FLAGELLOMANIAS GALACTORRHOEAS GALACTOSAEMIAS GALACTOSAMINES GALACTOSIDASES GALVANISATIONS GALVANIZATIONS GALVANOPLASTIC GASTROVASCULAR GIGANTOMACHIAS GLIOBLASTOMATA GRAMMATICALITY GRAMMATICASTER GYNAECOMASTIAS HAEMATOBLASTIC HAEMATOLOGICAL HAEMATOPHAGOUS HAEMATOTHERMAL HAGIOGRAPHICAL HANDICRAFTSMAN HEPATOPANCREAS HYPERCALCAEMIA HYPERNATRAEMIA HYPERSARCOMATA HYPOCALCAEMIAS HYPONATRAEMIAS INAPPROACHABLE INAPPROACHABLY INCAPACITATING INCAPACITATION INEGALITARIANS INFRALAPSARIAN INFRAMAXILLARY INTERAMBULACRA INTERAVAILABLE INTRACARDIALLY INTRACRANIALLY INTRAFALLOPIAN INTRAVASATIONS LABEFACTATIONS LABIALISATIONS LABIALIZATIONS LAMPADEPHORIAS LAMPADOMANCIES LATERALISATION LATERALIZATION LATITUDINARIAN LYMPHANGIOMATA MACADAMISATION MACADAMIZATION MACHIAVELLIANS MACRENCEPHALIA MACROAGGREGATE MACROCEPHALIAS MACRODIAGONALS MACROSPORANGIA MALACOSTRACANS MALACOSTRACOUS MALADAPTATIONS MALAPPROPRIATE MANAGEABLENESS MANAGERIALISMS MANAGERIALISTS MANUFACTURABLE MATHEMATICALLY MATHEMATICIANS MATRESFAMILIAS MATRIARCHALISM MEGALOMANIACAL MEGALOSAURIANS METANARRATIVES METAPHRASTICAL METASTATICALLY MISCELLANARIAN MONOMANIACALLY MORGANATICALLY NARCOCATHARSES NARCOCATHARSIS NARRATOLOGICAL NASOPHARYNGEAL NATURALISATION NATURALIZATION NAVIGATIONALLY NEOGRAMMARIANS NONAPPEARANCES NONGRAMMATICAL NYMPHOMANIACAL ORGANISATIONAL ORGANIZATIONAL OSTEOSARCOMATA OVERANALYTICAL PAEDIATRICIANS PAGANISTICALLY PALAEANTHROPIC PALAEOBOTANIES PALAEOBOTANIST PALAEOCLIMATES PALAEOCLIMATIC PALAEOGRAPHERS PALAEOGRAPHIES PALAEOGRAPHIST PALAEOMAGNETIC PALATABILITIES PALATALISATION PALATALIZATION PALATIALNESSES PALEOBOTANICAL PALEOGRAPHICAL PALMATIPARTITE PANGRAMMATISTS PANOPHTHALMIAS PANTOGRAPHICAL PANTOPRAGMATIC PAPAPRELATISTS PARABIOTICALLY PARABOLISATION PARABOLIZATION PARADIGMATICAL PARADISAICALLY PARADISIACALLY PARADOXICALITY PARAGRAMMATIST PARAINFLUENZAS PARAJOURNALISM PARALLELOGRAMS PARAMAGNETISMS PARAMETRICALLY PARAMILITARIES PARAPHRASTICAL PARAROSANILINE PARASITISATION PARASITIZATION PARATACTICALLY PARONOMASTICAL PATRESFAMILIAS PATRIALISATION PATRIALIZATION PATRIARCHALISM PENTABARBITALS PHALANSTERIANS PHANTASMAGORIA PHANTASMAGORIC PHANTASMICALLY PHARMACEUTICAL PHARMACOPOEIAL PHARMACOPOEIAN PHARMACOPOEIAS PIPIWHARAUROAS POSTLAPSARIANS PRAGMATICALITY PRAGMATISATION PRAGMATIZATION PREADAPTATIONS QUADRAGENARIAN QUADRANGULARLY QUADRILATERALS QUAQUAVERSALLY RADIALISATIONS RADIALIZATIONS RADICALISATION RADICALIZATION RADIOACTIVATED RADIOACTIVATES RADIOAUTOGRAPH RANGATIRATANGA RAREFICATIONAL RATIONALISABLE RATIONALIZABLE REACQUAINTANCE RECANALISATION RECANALIZATION SACCHARISATION SACCHARIZATION SACRALISATIONS SACRALIZATIONS SACRAMENTALISM SACRAMENTALIST SACRAMENTALITY SACRAMENTARIAN SACRAMENTARIES SALVAGEABILITY SANITARIANISMS SAXIFRAGACEOUS SCANDALISATION SCANDALIZATION SCLEROMALACIAS SEPTUAGENARIAN SPATIALISATION SPATIALIZATION SQUANDERMANIAS STAGFLATIONARY SUBAPPEARANCES SUBARACHNOIDAL SUPRALAPSARIAN SUPRAMAXILLARY TABULARISATION TABULARIZATION TACHYGRAPHICAL TALISMANICALLY TANTALISATIONS TANTALIZATIONS TARATANTARAING TARSOMETATARSI TARTARISATIONS TARTARIZATIONS TELANGIECTASIA TETRAGRAMMATON TETRASPORANGIA THALASSOGRAPHY THANATOLOGICAL THANATOPHOBIAS THAUMATOGRAPHY THAUMATROPICAL THAUMATURGICAL TOBACCANALIANS TRANSABDOMINAL TRANSAMINATION TRANSCAUCASIAN TRANSPLACENTAL TRANSPLANTABLE TRANSVALUATING TRANSVALUATION TRAUMATISATION TRAUMATIZATION TURANGAWAEWAES ULTRAHAZARDOUS ULTRAMARATHONS ULTRAPRACTICAL UNACADEMICALLY UNACQUAINTANCE UNADAPTABILITY UNAPPROACHABLE UNAPPROACHABLY UNAVAILABILITY UNDRAMATICALLY UNMAINTAINABLE UNMARRIAGEABLE UNMATHEMATICAL UNPALATABILITY UNTRANSLATABLE UNTRANSLATABLY URANOGRAPHICAL VALERIANACEOUS VALETUDINARIAN VANDALISATIONS VANDALIZATIONS VASODILATATION VASODILATATORY WARRANTABILITY