There are 424 fourteen-letter words containing A, M, R and 2T, https://www.bestwordlist.com/c/a/5/14letterwordswithamrtt.htm ABSORPTIOMETER ABSORPTIOMETRY ABSTRACTIONISM ACCOUSTREMENTS ACTINOMETRICAL ADMINISTRATING ADMINISTRATION ADMINISTRATIVE ADMINISTRATORS ADMINISTRATRIX ADVERTISEMENTS ADVERTIZEMENTS AFFREIGHTMENTS AFTERTREATMENT ALTIMETRICALLY AMITRIPTYLINES AMITRYPTYLINES ANAGRAMMATISTS ANTHROPOMETRIC ANTHROPOTOMIES ANTIARRHYTHMIA ANTIARRHYTHMIC ANTIDEMOCRATIC ANTIFORMALISTS ANTIGOVERNMENT ANTIHARASSMENT ANTILOGARITHMS ANTIMARKETEERS ANTIMILITARISM ANTIMILITARIST ANTIMODERNISTS ANTIMONARCHIST ANTIRHEUMATICS ANTIRITUALISMS ANTITERRORISMS ANTITHROMBOTIC APPERTAINMENTS APPORTIONMENTS APPRENTICEMENT ARCHAEOMETRIST ARGUMENTATIONS ARISTOCRATISMS ARITHMETICALLY ARITHMETICIANS AROMATHERAPIST AROMATISATIONS AROMATIZATIONS ASCERTAINMENTS ASTROCHEMISTRY AUTOEROTICISMS BLAMEWORTHIEST CASTRAMETATION CATASTROPHISMS CENTRIPETALISM CHEMAUTOTROPHS CHEMOAUTOTROPH CHEMOTHERAPIST CHRESTOMATHIES CHROMATICITIES CHROMATOLOGIST CIRCUMLITTORAL CIRCUMNUTATING CIRCUMNUTATION CIRCUMNUTATORY CIRCUMROTATING CIRCUMSTANTIAL COMMENTATORIAL COMPARATIVISTS COMPARTMENTING COMPATRIOTISMS CONCERTMASTERS CONTEMPERATION CONTEMPERATURE COUNTERSTREAMS CRANIOMETRISTS DECONTAMINATOR DEMONSTRATIONS DEMONSTRATIVES DEPARTMENTALLY DERMATOLOGISTS DERMATOPLASTIC DETERMINATIONS DETERMINATIVES DEUTEROGAMISTS DIATHERMANEITY DIFFRACTOMETER DIFFRACTOMETRY DISENTHRALMENT DISENTRAINMENT DISFEATUREMENT DISHEARTENMENT DISTEMPERATURE DOCUMENTARISTS DRAMATISATIONS DRAMATIZATIONS ELECTROMAGNETS ELECTROMOTANCE ELECTROTHERMAL EMIGRATIONISTS ENDARTERECTOMY ENTERTAINMENTS ENTOMOSTRACANS ENTOMOSTRACOUS EPIGRAMMATISTS EXCREMENTITIAL EXTEMPORANEITY EXTERMINATIONS EXTRAMARITALLY FERMENTABILITY FERMENTATIVELY FORESTALLMENTS FRAGMENTATIONS GALACTOMETRIES GEOMETRISATION GEOMETRIZATION GRAMMATICALITY GRAMMATICASTER GRAMMATOLOGIST HAEMACYTOMETER HAEMATOTHERMAL HAEMOCYTOMETER HAMARTHRITISES HEMACYTOMETERS HETEROAROMATIC HETEROGAMETIES HETEROSOMATOUS HETEROTHALLISM HOMOTRANSPLANT HYPERSTIMULATE IATROCHEMISTRY IMMATERIALISTS IMPARIDIGITATE IMPARTIALITIES IMPENETRATIONS IMPERTURBATION IMPRACTICALITY INCREMENTALIST INSTRUMENTALLY INTEMERATENESS INTERACTIONISM INTERANIMATION INTERLACEMENTS INTERLAMINATED INTERLAMINATES INTERMEDIATELY INTERMEDIATING INTERMEDIATION INTERMEDIATORS INTERMEDIATORY INTERMENSTRUAL INTERMETALLICS INTERMIGRATION INTERPERMEATED INTERPERMEATES INTERSEGMENTAL INTERTERMINALS INTERVALOMETER INTERWEAVEMENT INTRANSMUTABLE LIPOGRAMMATIST LITHOCHROMATIC MACROMUTATIONS MACRONUTRIENTS MACROSTRUCTURE MAGISTRALITIES MAGISTRATESHIP MAGNETOMETRIES MAINSTREETINGS MARICULTURISTS MARKETISATIONS MARKETIZATIONS MARTYRISATIONS MARTYRIZATIONS MARTYROLOGISTS MASSOTHERAPIST MATRICULATIONS MEGASTRUCTURES MEGAVERTEBRATE MELODRAMATISTS MERCANTILISTIC METACHROMATISM METANARRATIVES METAPHRASTICAL METRIFICATIONS METROPOLITICAL METROSEXUALITY MICROCASSETTES MICROPEGMATITE MICROSATELLITE MICROSTOMATOUS MILITARISATION MILITARIZATION MINISTERIALIST MISANTHROPISTS MISARTICULATED MISARTICULATES MISATTRIBUTING MISATTRIBUTION MISORIENTATION MISTRANSLATING MISTRANSLATION MITHRIDATISING MITHRIDATIZING MONOUNSATURATE MORTIFICATIONS MOUTHBREATHERS MULTARTICULATE MULTICHARACTER MULTIFACTORIAL MULTILATERALLY MULTIPARAMETER MULTIPARTICLES MULTIPARTYISMS MULTIPLICATORS MULTITERMINALS MULTITHREADING MULTIVIBRATORS NEUROANATOMIST NITROBACTERIUM NONIMPORTATION NONMONETARISTS NONTEMPORALITY NONTERMINATING OLFACTOMETRIES OPHTHALMOMETER OPHTHALMOMETRY ORNAMENTATIONS ORTHOCHROMATIC ORTHOGNATHISMS OSTEODERMATOUS OSTEOSARCOMATA OVERADJUSTMENT OVERESTIMATING OVERESTIMATION OVERMATURITIES OVERSTATEMENTS OVERSTIMULATED OVERSTIMULATES OVERTREATMENTS PALMATIPARTITE PANCREATECTOMY PANGRAMMATISTS PANSPERMATISTS PANTOPRAGMATIC PARAGRAMMATIST PARTITIONMENTS PERIPATETICISM PHARMACEUTISTS PHOTOGRAMMETRY PHOTOTELEGRAMS PHOTOTHERMALLY PNEUMATOMETERS POSTMASTERSHIP POSTTREATMENTS PRAGMATICALITY PRAGMATISATION PRAGMATIZATION PREDETERMINATE PREMEDITATEDLY PREMEDITATIONS PRESENTIMENTAL PRESYMPTOMATIC PRETERMINATION PRIMATOLOGISTS PROTOACTINIUMS PROTOPLASMATIC QUARTERMASTERS QUATTROCENTISM RADIOSTRONTIUM RADIOTELEMETER RADIOTELEMETRY REAPPOINTMENTS RECOMPUTATIONS RECONTAMINATED RECONTAMINATES RECREMENTITIAL REFORMATIONIST REFRACTOMETERS REFRACTOMETRIC REGIMENTATIONS REIMPLANTATION REIMPORTATIONS REINSTATEMENTS REMONETISATION REMONETIZATION REMONSTRATIONS RESTIMULATIONS RESTORATIONISM RESYSTEMATISED RESYSTEMATISES RESYSTEMATIZED RESYSTEMATIZES RETINOBLASTOMA RETRANSMITTING RHABDOMANTISTS RHEUMATOLOGIST RHYTHMISATIONS RHYTHMIZATIONS SACRAMENTALIST SACRAMENTALITY SCATTERMOUCHES SCATTEROMETERS SHAMEWORTHIEST SOMATOTROPHINS SOMATOTROPINES SPATIOTEMPORAL SPERMATOBLASTS SPERMATOPHYTES SPERMATOPHYTIC SPERMATOTHECAE SPERMATOTHECAS SPORTSMANLIEST STALACTITIFORM STALAGMOMETERS STATIONMASTERS STEREOMETRICAL STERNOMASTOIDS STICHOMETRICAL STIGMATIFEROUS STOMATOGASTRIC STRABISMOMETER STRUCTURALISMS SUBDEPARTMENTS SUBMETACENTRIC SUFFRAGETTISMS SUPERIMPORTANT SUPERMILITANTS SUPERSTIMULATE SYMMETRISATION SYMMETRIZATION TACHEOMETRICAL TARSOMETATARSI TASKMISTRESSES TATTERDEMALION TAUTOCHRONISMS TELEMARKETINGS TELEMETRICALLY TELOMERISATION TELOMERIZATION TEMPERAMENTFUL TEMPORISATIONS TEMPORIZATIONS TERRITORIALISM TESTAMENTARILY TETARTOHEDRISM TETRACHOTOMIES TETRACHOTOMOUS TETRADRACHMONS TETRAGRAMMATON THAUMATOGRAPHY THAUMATROPICAL THAUMATURGICAL THAUMATURGISMS THAUMATURGISTS THAUMATURGUSES THEANTHROPISMS THEATRICALISMS THERMAESTHESIA THERMALISATION THERMALIZATION THERMESTHESIAS THERMOLABILITY THERMOMAGNETIC THERMOMETRICAL THERMOPLASTICS THERMOREGULATE THERMOREMANENT THERMOSTATTING THERMOTOLERANT THORACOSTOMIES THROMBOPLASTIC THROMBOPLASTIN TOLERATIONISMS TRACHEOSTOMIES TRADITIONALISM TRANSAMINATION TRANSCRIPTOMES TRANSFORMATION TRANSFORMATIVE TRANSFORMISTIC TRANSMIGRATING TRANSMIGRATION TRANSMIGRATIVE TRANSMIGRATORS TRANSMIGRATORY TRANSMISSIVITY TRANSMITTANCES TRANSMITTIVITY TRANSMUTATIONS TRANSSHIPMENTS TRANSVESTITISM TRAUMATISATION TRAUMATIZATION TRAUMATOLOGIES TREPONEMATOSES TREPONEMATOSIS TRICHROMATISMS TRIETHYLAMINES TRIHALOMETHANE TRIIODOMETHANE TRILATERALISMS TRILITERALISMS TRIMETHADIONES TRIMETHYLAMINE ULTRACOMPETENT ULTRAMARATHONS ULTRAMICROTOME ULTRAMICROTOMY ULTRAMILITANTS ULTRAMINIATURE ULTRAMODERNIST ULTRAMONTANISM ULTRAMONTANIST ULTRARIGHTISMS ULTRAROMANTICS UNDEMONSTRATED UNDERESTIMATED UNDERESTIMATES UNDERSTATEMENT UNMATRICULATED UNPREMEDITATED UNTRANSMUTABLE UTILITARIANISM WEATHEROMETERS