There are 556 fourteen-letter words containing A, B, O and S, https://www.bestwordlist.com/c/a/4/14letterwordswithabos.htm
ABDOMINOPLASTY ABOMINABLENESS ABORIGINALISMS ABORTIFACIENTS ABORTIVENESSES
ABSOLUTENESSES ABSORBEFACIENT ABSORPTIOMETER ABSORPTIOMETRY ABSORPTIVENESS
ABSORPTIVITIES ABSTEMIOUSNESS ABSTENTIONISMS ABSTENTIONISTS ABSTRACTIONISM
ABSTRACTIONIST ACCOMPLISHABLE ACINETOBACTERS ACTINOBACILLUS ADOPTABILITIES
ADORABLENESSES AEROBALLISTICS AEROBIOLOGISTS AGROBIOLOGISTS AGROBUSINESSES
AILOUROPHOBIAS ALLOANTIBODIES ALLOWABILITIES AMBASSADORSHIP AMBIDEXTROUSLY
AMPHIBIOUSNESS ANTIMICROBIALS ANTISCORBUTICS ANTISUBVERSION ARABICISATIONS
ARABICIZATIONS ARACHNOPHOBIAS ARACHNOPHOBICS ARBORICULTURES ARCHBISHOPRICS
ARCHEOBOTANIES ARCHEOBOTANIST ARITHMOPHOBIAS ASTRAPOPHOBIAS ASTROBIOLOGIES
ASTROBIOLOGIST AUTOANTIBODIES AUTOMOBILITIES AVOWABLENESSES BACKWARDATIONS
BACTERIOLOGIES BACTERIOLOGIST BACTERIOLYSINS BACTERIOPHAGES BACTERIOSTASES
BACTERIOSTASIS BACTERIOSTATIC BACTERIOTOXINS BACTERISATIONS BACTERIZATIONS
BALKANISATIONS BALKANIZATIONS BALLISTOSPORES BALSAMINACEOUS BAMBOOZLEMENTS
BARBARISATIONS BARBARIZATIONS BASIDIOMYCETES BASIDIOSPOROUS BASTARDISATION
BASTARDIZATION BEATIFICATIONS BEHAVIOURISTIC BENEDICTIONALS BENEFICIATIONS
BENZIMIDAZOLES BERBERIDACEOUS BIBLIOGRAPHERS BIBLIOGRAPHIES BIBLIOLATRISTS
BIBLIOPHAGISTS BICONDITIONALS BILDUNGSROMANS BINOCULARITIES BIOACCUMULATES
BIOACOUSTICIAN BIOAERONAUTICS BIOASTRONOMIES BIODEGRADABLES BIOGEOGRAPHERS
BIOGEOGRAPHIES BIOINFORMATICS BIOMATHEMATICS BIOREGIONALISM BIOREGIONALIST
BIOSTATISTICAL BIOSYSTEMATICS BIOSYSTEMATIST BIPOLARISATION BISPHOSPHONATE
BITUMINISATION BLAMESTORMINGS BLAMEWORTHIEST BLANKETFLOWERS BLEPHAROPLASTS
BLEPHAROPLASTY BLEPHAROSPASMS BOARDERCROSSES BOARDINGHOUSES BOASTFULNESSES
BONEHEADEDNESS BOUGAINVILLEAS BOUILLABAISSES BOWDLERISATION BRAINSTORMINGS
BRANCHIOSTEGAL BRASSFOUNDINGS BREASTSTROKERS BRONCHIECTASES BRONCHIECTASIS
BRONCHOSPASTIC BRONTOSAURUSES BRUTALISATIONS BRUTALIZATIONS BUFFALOBERRIES
CAMPYLOBACTERS CANCEROPHOBIAS CARBONISATIONS CARBONIZATIONS CARBONYLATIONS
CARBOXYLATIONS CARBURISATIONS CARBURIZATIONS CLAUSTROPHOBES CLAUSTROPHOBIA
CLAUSTROPHOBIC COACHBUILDINGS COCARBOXYLASES COLLABORATIONS COLLABORATIVES
COLLAPSABILITY COLLAPSIBILITY COLORABILITIES COLOURABLENESS COMMUTABLENESS
COMPARABLENESS COMPASSIONABLE COMPATIBLENESS COMPENSABILITY COMPLIABLENESS
COMPUTERISABLE CONCUBITANCIES CONDENSABILITY CONFABULATIONS CONNUBIALITIES
CONSTABLESHIPS CONSTABLEWICKS CONSTABULARIES CONSTRUABILITY CONSUBSTANTIAL
CONTABESCENCES CONTESTABILITY CONTRABANDISMS CONTRABANDISTS CONTRABASSISTS
CONTRABASSOONS CONTRIBUTARIES CORROBORATIONS CORROBORATIVES COUNTABILITIES
CROSSABILITIES CUCURBITACEOUS CYBERCHONDRIAS DAUGHTERBOARDS DEAMBULATORIES
DEBONAIRNESSES DECARBONATIONS DECARBOXYLASES DECARBOXYLATES DECARBURATIONS
DECEREBRATIONS DEFIBRILLATORS DEFIBRINATIONS DEMOBILISATION DEPLORABLENESS
DESOBLIGEANTES DETONABILITIES DIABETOLOGISTS DIABOLICALNESS DIAGNOSABILITY
DIAGONALISABLE DINOTURBATIONS DISAMBIGUATION DISAPPROBATION DISAPPROBATIVE
DISAPPROBATORY DISATTRIBUTION DISCOMBOBERATE DISCOMBOBULATE DISCOMFORTABLE
DISCOMMENDABLE DISCONFORMABLE DISCOURAGEABLE DISEMBARKATION DISOBLIGATIONS
DISPOSABLENESS DISSOCIABILITY DISSOLVABILITY DISTRIBUTIONAL DODECASYLLABIC
DODECASYLLABLE DOUBLESPEAKERS EQUILIBRATIONS ERYTHROBLASTIC ERYTHROPHOBIAS
ETHNOBOTANISTS EUPHORBIACEOUS FABULOUSNESSES FASHIONABILITY FAVORABILITIES
FAVOURABLENESS FIBROSARCOMATA FISSIONABILITY FLOATABILITIES FORESEEABILITY
FORGEABILITIES FORMIDABLENESS FUNAMBULATIONS GERONTOPHOBIAS GLABROUSNESSES
GLIOBLASTOMATA GLOBALISATIONS GLOBALIZATIONS GLOBULARNESSES GOVERNABLENESS
GROUNDBREAKERS GYROSTABILISER GYROSTABILIZER HAEMATOBLASTIC HEMIMETABOLOUS
HERBORISATIONS HERBORIZATIONS HETEROBLASTIES HIBERNISATIONS HIBERNIZATIONS
HOLOMETABOLISM HOLOMETABOLOUS HONORABILITIES HONOURABLENESS HOSPITABLENESS
HOUSEBREAKINGS HYBRIDISATIONS HYBRIDIZATIONS IMMOBILISATION IMMOVABILITIES
IMMOVEABLENESS IMPRESSIONABLE IMPROBABLENESS IMPROVABLENESS INCONCEIVABLES
INCONSCIONABLE INCONSIDERABLE INCONSIDERABLY INDECOMPOSABLE INDEMONSTRABLE
INDEMONSTRABLY INDISCOVERABLE INEXORABLENESS INOBSERVATIONS INOPERABLENESS
INSALUBRIOUSLY INSUBORDINATES INSURMOUNTABLE INSURMOUNTABLY INTERBEHAVIORS
INVIOLABLENESS IRRECOGNISABLE ISOCARBOXAZIDS KNOWABLENESSES LABEFACTATIONS
LABIALISATIONS LABIALIZATIONS LABOUREDNESSES LABRADORESCENT LACTOGLOBULINS
LIBERALISATION LIBERATIONISMS LIBERATIONISTS LOCALISABILITY LOVEABLENESSES
MACROGLOBULINS MALABSORPTIONS MARSIPOBRANCHS MATCHBOARDINGS MEGAHERBIVORES
MEMORABILITIES METAGRABOLISED METAGRABOLISES METAGRABOLIZES METAGROBOLISED
METAGROBOLISES METAGROBOLIZES MISATTRIBUTION MISOBSERVANCES MODIFIABLENESS
MODULABILITIES MONOSYLLABISMS MOULDABILITIES MOUNTAINBOARDS MOUNTEBANKINGS
MOUNTEBANKISMS MOUTHBREATHERS MOVEABLENESSES MUCOMEMBRANOUS MULTIVIBRATORS
NANOPUBLISHING NEOLIBERALISMS NEPHROBLASTOMA NEUROBLASTOMAS NEUROFEEDBACKS
NONANTIBIOTICS NONCONDENSABLE NONESTABLISHED NONEXPENDABLES NONFISSIONABLE
NONJUSTICIABLE NONNEGOTIABLES NONOBSERVANCES NONPERISHABLES NONPOLARISABLE
NONRECYCLABLES NONRETURNABLES OBDURATENESSES OBEDIENTIARIES OBJECTIVATIONS
OBLIGATORINESS OBSERVABLENESS OBSTREPERATING OLALLIEBERRIES OMBUDSMANSHIPS
OPISTHOBRANCHS OPPOSABILITIES ORBICULARITIES ORGANISABILITY ORNITHOPHOBIAS
OROBANCHACEOUS OVERABUNDANCES OVERBREATHINGS OVERELABORATES PALAEBIOLOGIES
PALAEBIOLOGIST PALAEOBOTANIES PALAEOBOTANIST PALEOBIOLOGIES PALEOBIOLOGIST
PALEOBOTANISTS PARABOLISATION PARDONABLENESS PARTICLEBOARDS PATHOBIOLOGIES
PENTOBARBITALS PERAMBULATIONS PERSONABLENESS PERTURBATORIES PHENOBARBITALS
PHLEBOGRAPHIES PLEBIFICATIONS PNEUMOBACILLUS POLARISABILITY POLYBUTADIENES
POLYCARBONATES POLYSYLLABICAL POLYSYLLABISMS POSTLIBERATION PREFABRICATORS
PROBABILIORISM PROBABILIORIST PROBATIONARIES PROCESSABILITY PROFITABLENESS
PROPAGABLENESS PROTUBERANCIES PROTUBERATIONS PROVABLENESSES PROVEABILITIES
PROVERBIALISED PROVERBIALISES PROVERBIALISMS PROVERBIALISTS PROVERBIALIZES
PSEUDOMEMBRANE PSYCHOBABBLERS PSYCHOBABBLING QUOTABLENESSES RADIOBIOLOGIES
RADIOBIOLOGIST RAMBUNCTIOUSLY RATIONALISABLE REASONABLENESS REATTRIBUTIONS
REBROADCASTING RECALIBRATIONS RECOMBINATIONS REDISCOUNTABLE REHABILITATORS
RELUBRICATIONS REMOBILISATION REMOVABILITIES REPUBLICATIONS RESOLVABLENESS
RESTORABLENESS RETINOBLASTOMA REVERBERATIONS REVOCABILITIES REVOKABILITIES
RHABDOMANTISTS RHABDOMYOLYSES RHABDOMYOLYSIS ROLLERBLADINGS ROUNDABOUTNESS
SALUBRIOUSNESS SCABROUSNESSES SEASONABLENESS SEMICARBAZONES SHOCKABILITIES
SIMAROUBACEOUS SKATEBOARDINGS SNOWBOARDCROSS SOCIABLENESSES SOLUBILISATION
SOLUBILIZATION SOLVABLENESSES SOMNAMBULANCES SOMNAMBULATING SOMNAMBULATION
SOMNAMBULATORS SOMNAMBULISTIC SORBITISATIONS SORBITIZATIONS SPERMATOBLASTS
SPONGIOBLASTIC SPORTABILITIES SPRINGBOARDING STABILISATIONS STABILIZATIONS
STOCKBROKERAGE STRABISMOMETER STREPTOBACILLI STROBILISATION STROBILIZATION
STROBOSCOPICAL SUBADOLESCENTS SUBAGGREGATION SUBALLOCATIONS SUBALTERNATION
SUBARACHNOIDAL SUBARBORESCENT SUBASSOCIATION SUBATMOSPHERIC SUBCATEGORISED
SUBCATEGORISES SUBCATEGORIZED SUBCATEGORIZES SUBCONTINENTAL SUBCONTRACTING
SUBCONTRACTORS SUBCONTRARIETY SUBCUTANEOUSLY SUBDEACONSHIPS SUBGENERATIONS
SUBINDICATIONS SUBINFEUDATION SUBINFEUDATORY SUBINSINUATION SUBIRRIGATIONS
SUBNORMALITIES SUBORDINANCIES SUBORDINATIONS SUBPOPULATIONS SUBPROLETARIAT
SUBSATURATIONS SUBSIDISATIONS SUBSIDIZATIONS SUBSPONTANEOUS SUBSTANTIATION
SUBSTANTIATORS SUBSTITUTIONAL SUBTILISATIONS SUBTILIZATIONS SUPERABOUNDING
SUPERABSORBENT SUPERAMBITIOUS SUPERIMPOSABLE SUPPORTABILITY SYLLABICATIONS
SYMBIONTICALLY SYMBOLICALNESS SYMBOLISATIONS SYMBOLIZATIONS SYMBOLOLATRIES
SYMMETROPHOBIA SYPHILOPHOBIAS TABLESPOONFULS TABLESPOONSFUL TABULARISATION
THANATOPHOBIAS THERMOBALANCES THIABENDAZOLES THIOCARBAMIDES THOROUGHBASSES
THOROUGHBRACES THROMBOKINASES THROMBOPHILIAS THROMBOPLASTIC THROMBOPLASTIN
TINTINNABULOUS TOBACCANALIANS TOLERABILITIES TRANSABDOMINAL TROUBLEMAKINGS
TUBERCULATIONS TURBOCHARGINGS UMBRAGEOUSNESS UNCOLLECTABLES UNCONQUERABLES
UNCONSCIONABLE UNCONSCIONABLY UNDECOMPOSABLE UNDEMONSTRABLE UNDISCOVERABLE
UNDISCOVERABLY UNFASHIONABLES UNKNOWABLENESS UNMENTIONABLES UNQUESTIONABLE
UNQUESTIONABLY UNRECOGNISABLE UNRECOGNISABLY UNSOCIABLENESS UNSURMOUNTABLE
VAPORABILITIES VASOINHIBITORS VASOINHIBITORY VERBALISATIONS VERBALIZATIONS
VERBIFICATIONS VERBIGERATIONS VIOLABLENESSES VOIDABLENESSES WATERBOARDINGS
WEBLIOGRAPHIES WHATABOUTERIES WORKABLENESSES ZINGIBERACEOUS ZINZIBERACEOUS
ZOMBIFICATIONS