There are 613 twelve-letter words containing A, 2O, P and S, https://www.bestwordlist.com/c/a/5/12letterwordswithaoops.htm ABIOTROPHIES ACIDOPHILOUS ADOPTIONISMS ADOPTIONISTS AECIDIOSPORE AECIDOSPORES AEOLOTROPIES AEROTROPISMS AETHRIOSCOPE AGORAPHOBIAS AGORAPHOBICS AILUROPHOBES ALDOPENTOSES ALLELOMORPHS ALLOMORPHISM ALLOPURINOLS ALLOTROPISMS AMBIOPHONIES AMINOPHENOLS AMPHICOELOUS AMPHISTOMOUS AMPHITROPOUS AMYOTROPHIES ANAMORPHOSES ANAMORPHOSIS ANCHORPERSON ANEMOPHILOUS ANEMOPHOBIAS ANGIOCARPOUS ANGLOPHOBIAS ANISOMORPHIC ANISOTROPIES ANISOTROPISM ANTEPOSITION ANTHOCARPOUS ANTHOPHILOUS ANTIGROPELOS ANTISTROPHON APLANOSPORES APOCOPATIONS APOCYNACEOUS APOCYNTHIONS APOLLONICONS APOMORPHINES APOSTOLICISM APOSTOLICITY APOSTOLISING APOSTOLIZING APOSTROPHISE APOSTROPHIZE APOTHEOSISED APOTHEOSISES APOTHEOSIZED APOTHEOSIZES APOTROPAISMS APPASSIONATO APPORTIONERS APPOSITIONAL APPROBATIONS ARTHROPODOUS ARTHROSCOPES ARTHROSCOPIC ARTHROSPORES ARTHROSPORIC ASPORTATIONS ASTROCOMPASS ASTROPHOBIAS AUTOEXPOSURE AUTOHYPNOSES AUTOHYPNOSIS AUTOMORPHISM AUTOTROPHIES AUXOTROPHIES AXEROPHTHOLS AZOOSPERMIAS BAROPHORESES BAROPHORESIS BASIDIOSPORE BATHOPHILOUS BATHOPHOBIAS BLASTOSPORES BOOTSTRAPPED BOOTSTRAPPER BRANCHIOPODS BRONCHOSPASM CACOPHONIOUS CACOTROPHIES CARPHOLOGIES CARPOLOGISTS CARPOPHAGOUS CHLOROPLASTS CHOREOGRAPHS CHROMATOPSIA CHROMOPLASTS CHRONOGRAPHS CLADOSPORIUM COAUTHORSHIP COLEOPTERANS COMMONPLACES COMPASSIONED COMPENSATION COMPENSATORS COMPENSATORY COMPILATIONS COMPORTANCES COMPOTATIONS COMPRIMARIOS COMPULSATORY COMPURGATORS COMPUTATIONS CONSPIRATION CONSPIRATORS CONSPIRATORY CONSTIPATION CONTRAPPOSTO CONTRAPTIONS COOPERATIONS COOPERATIVES COPROPHAGANS COPROPHAGIES COPROPHAGIST COPROPHAGOUS COPROPHILIAS CORONAGRAPHS CORONOGRAPHS CORPORALSHIP CORPORATIONS CORPORATISED CORPORATISES CORPORATISMS CORPORATISTS CORPORATIZES CORPOREALISE CORPOREALISM CORPOREALIST COSMOGRAPHER COSMOGRAPHIC COSMOPLASTIC COSMOPOLITAN COTRANSPORTS CRAPSHOOTERS CRYPTOGAMOUS CTENOPHORANS DACTYLOSCOPY DECOMPOSABLE DEPLORATIONS DEPOPULATORS DEPORTATIONS DEPOSITATION DEPOSITIONAL DESPOLIATION DESPOTOCRACY DISCOPHORANS DISCORPORATE DISOPERATION DOXOGRAPHERS DOXOGRAPHIES DROMOPHOBIAS EDAPHOLOGIES EMETOPHOBIAS ENTOPLASTRON EOSINOPHILIA EPANORTHOSES EPANORTHOSIS EPISTOLATORY EPOXIDATIONS ERGATOMORPHS EROTOPHOBIAS ESCAPOLOGIES ESCAPOLOGIST EVAPORATIONS EXOPHTHALMOS EXPLORATIONS EXPORTATIONS EXPOSITIONAL EXPOSTULATOR FLAPPERHOODS FORCIPATIONS FORETOPMASTS FRANCOPHOBES FRANCOPHONES GALVANOSCOPE GALVANOSCOPY GAMETOPHORES GAMOPETALOUS GAMOPHYLLOUS GAMOSEPALOUS GAMOTROPISMS GASTROPODANS GASTROPODOUS GASTROSCOPES GASTROSCOPIC GASTROSOPHER GLOSSOGRAPHY GRAMOPHONIES GRAMOPHONIST GRAPHOLOGIES GRAPHOLOGIST GREASEPROOFS HAEMOPHOBIAS HAEMOPOIESES HAEMOPOIESIS HALOPERIDOLS HAPTOGLOBINS HAPTOTROPISM HARMONIPHONS HEPATOGENOUS HEPATOLOGIES HEPATOLOGIST HETEROTOPIAS HIEROPHOBIAS HIPPOPHAGOUS HIPPOPOTAMUS HOLOGRAPHERS HOLOGRAPHIES HOLOPARASITE HOLOPHRASTIC HOMEOPATHIES HOMEOPATHIST HOMOGRAPHIES HOMOPLASMIES HOMOPLASTIES HOROGRAPHERS HOROGRAPHIES HYDROPHANOUS HYDROPHOBIAS HYPNOPHOBIAS HYPOCORISMAS HYPOGLOSSALS HYPOGNATHOUS HYPOPLASTRON HYPSOPHOBIAS IMPERSONATOR IMPLORATIONS IMPORTATIONS IMPROBATIONS IMPROVISATOR INCORPORATES ISOMETROPIAS ISOTOPICALLY JEOPARDOUSLY KALEIDOSCOPE LAGOMORPHOUS LALAPALOOZAS LAMPOONERIES LAPAROSCOPES LAPAROSCOPIC LAPAROTOMIES LAPIDICOLOUS LARYNGOSCOPE LARYNGOSCOPY LEPTOSOMATIC LITHOPHAGOUS LOGOGRAPHERS LOGOGRAPHIES LOLLAPALOOSA LOPHOBRANCHS LYMPHOMATOUS MACROPHAGOUS MACROPTEROUS MALLOPHAGOUS MALPOSITIONS MASTIGOPHORE MELANOPHORES METAMORPHOSE METAMORPHOUS MICROPHAGOUS MISANTHROPOS MONADELPHOUS MONOGRAPHERS MONOGRAPHIES MONOGRAPHIST MONOPETALOUS MONOSEPALOUS MONOSYNAPTIC MORPHOSYNTAX MOUNTAINTOPS NAPOLEONITES NECROPHAGOUS NECROPHOBIAS NEGROPHOBIAS NEMATOPHORES NOMOGRAPHERS NOMOGRAPHIES NONHOSPITALS NONPHOSPHATE NOSOGRAPHERS NOSOGRAPHIES NOSTOPATHIES NYCTOPHOBIAS OBSTIPATIONS OBSTROPALOUS OCHLOPHOBIAS OCTAPLOIDIES OCTASTROPHIC OCTOPETALOUS OCTOSEPALOUS ODONTOGRAPHS OESOPHAGITIS OESOPHAGUSES OLEOGRAPHIES OLIGOPHAGIES OLIGOPHAGOUS OLIGOSPERMIA OMMATOPHORES OPERATIONISM OPERATIONIST OPERATORLESS OPHIOLATRIES OPHIOLATROUS OPHIOPHAGOUS OPINIONATORS OPISTHOGRAPH OPOTHERAPIES OPPIGNORATES OPPOSABILITY OPPOSITIONAL OPSONISATION OPSONIZATION OPTIMISATION OPTOACOUSTIC OREOGRAPHIES OROPHARYNGES OROPHARYNXES ORTHOPAEDICS ORTHOPAEDIES ORTHOPAEDIST ORTHOPRAXIES ORTHOPTERANS OSCILLOGRAPH OSTEOPATHIES OSTEOPATHIST OSTEOPLASTIC OSTREOPHAGES OUTPASSIONED OUTPOPULATES OVERCANOPIES OVEROPERATES OVERPROGRAMS OXYCEPHALOUS PAEDODONTICS PAEDOLOGISTS PALAEOLOGIES PALUDICOLOUS PALYNOLOGIES PALYNOLOGIST PAMPELMOOSES PANTOPHAGOUS PANTOPHOBIAS PAPYROLOGIES PAPYROLOGIST PARAMORPHOUS PARASITOLOGY PARATROOPERS PARONOMASIAS PARONOMASIES PARONOMASTIC PARONYMOUSLY PARSIMONIOUS PATHOGNOMIES PATHOLOGISED PATHOLOGISES PATHOLOGISTS PATHOLOGIZES PATHOPHOBIAS PATROCLINOUS PATROLOGISTS PATROONSHIPS PERCOLATIONS PERFORATIONS PERIODONTIAS PERSONATIONS PESTOLOGICAL PETRODOLLARS PHAENOGAMOUS PHAENOLOGIES PHAGOCYTOSED PHAGOCYTOSES PHAGOCYTOSIS PHAGOPHOBIAS PHILOLOGIANS PHONOPHOBIAS PHONOTACTICS PHOSPHORATED PHOSPHORATES PHOTOELASTIC PHOTOFLASHES PHOTOLYSABLE PHOTOMOSAICS PHOTONASTIES PHOTOPHOBIAS PHOTOREALISM PHOTOREALIST PHOTOSCANNED PHOTOSTATING PHOTOSTATTED PHRASEOLOGIC PHYTOPHAGOUS PIGNORATIONS PLAGIOSTOMES PLASMOSOMATA PLEROPHORIAS POCOCURANTES POLARISATION POLARISCOPES POLARISCOPIC POLAROGRAPHS POLLINATIONS POLYALCOHOLS POLYAMORISTS POLYCHAETOUS POLYGAMOUSLY POLYGONATUMS POLYOMAVIRUS POLYPETALOUS POLYSEPALOUS POLYSILOXANE POLYSORBATES POLYTONALISM POLYTONALIST PONDERATIONS PORCELAINOUS PORCELANEOUS PORCELLANOUS PORNOCRACIES POSITIONALLY POSSESSIONAL POSTABORTION POSTCOLONIAL POSTCORONARY POSTDOCTORAL POSTHOSPITAL POSTILLATION POSTILLATORS POSTNEONATAL POSTORGASMIC POSTROMANTIC POSTULATIONS POSTVAGOTOMY POTAMOGETONS POTAMOLOGIES POTAMOLOGIST POTENTIATORS POWERBOATERS PRAXEOLOGIES PRAXINOSCOPE PRECOLONIALS PREDOCTORALS PROBATIONERS PROBOSCIDEAN PROBOSCIDIAN PROCESSIONAL PROCONSULATE PROCREATIONS PROCTODAEUMS PROCURATIONS PROFANATIONS PROFESSIONAL PROFESSORATE PROFESSORIAL PROFESSORIAT PROMULGATORS PROOFREADERS PROPAGATIONS PROPITIATORS PROPRANOLOLS PROROGATIONS PROSAUROPODS PROSECTORIAL PROSOBRANCHS PROSODICALLY PROSOPOPEIAL PROSOPOPEIAS PROSOPOPOEIA PROSTRATIONS PROTAGONISMS PROTAGONISTS PROTESTATION PROTOMARTYRS PROTONATIONS PROTOPATHIES PROTOPLANETS PROTOPLASMAL PROTOPLASMIC PROTOPLASTIC PROTRACTIONS PROVISIONALS PROVISIONARY PROVOCATEURS PROVOCATIONS PROVOCATIVES PROXIMATIONS PSEUDOLOGIAS PSEUDOMONADS PSEUDOPODIAL PSEUDORANDOM PSYCHOSOCIAL PUFFTALOONAS PUFTALOONIES RADIOISOTOPE RADIOPHONICS RADIOPHONIES RADIOPHONIST RADIOSCOPIES REABSORPTION REAPPORTIONS REOPERATIONS REPROBATIONS RESPONSORIAL RETINOSPORAS RHINOPHONIAS RHIZOCARPOUS RHIZOPHAGOUS RHODODAPHNES SAPROPHAGOUS SAPROTROPHIC SARCOPHAGOUS SARRUSOPHONE SATANOPHOBIA SAXOPHONISTS SCATOPHAGOUS SCOLOPACEOUS SCOLOPENDRAS SCOPOLAMINES SCOPOPHILIAC SCOPOPHILIAS SCOPOPHOBIAS SCOPTOPHILIA SCOPTOPHOBIA SCORPAENOIDS SCRAPBOOKERS SCRAPBOOKING SHARPSHOOTER SHATTERPROOF SHOPAHOLISMS SINDONOPHANY SITIOPHOBIAS SNAPSHOOTERS SNAPSHOOTING SNOBOGRAPHER SOAPOLALLIES SOCIOPATHIES SOMATOPLASMS SOMATOPLEURE SOMATOTROPIC SOMATOTROPIN SOMATOTYPING SONOGRAPHERS SONOGRAPHIES SOPHOMORICAL SOUSAPHONIST SPANOKOPITAS SPERMATOZOAL SPERMATOZOAN SPERMATOZOIC SPERMATOZOID SPERMATOZOON SPODOMANCIES SPONGIOBLAST SPORANGIOLES SPORANGIOLUM SPORULATIONS STAUROSCOPES STAUROSCOPIC STEATOPYGOUS STEGOCARPOUS STENOPHAGOUS STROPHIOLATE SUBAPOSTOLIC SUDORIPAROUS SULPHONATION SYNAPOMORPHY SYNAPTOSOMAL SYNAPTOSOMES SYNCOPATIONS TAPHONOMISTS TAPHOPHOBIAS TAUTOPHONIES TEASPOONFULS TEASPOONSFUL TEMPORANEOUS TETRASPOROUS THEOPHOBIACS THEOSOPHICAL THORACOSCOPE TOMOGRAPHIES TOPOGRAPHERS TOPOGRAPHIES TORSIOGRAPHS TOXIPHOBIACS TRACHEOSCOPY TRANSPONDORS TRAPSHOOTERS TRAPSHOOTING TROPHOBLASTS TROPHOPLASMS TROPOSCATTER TRYPANOSOMAL TRYPANOSOMES TRYPANOSOMIC UNCOMPOSABLE UPROARIOUSLY VAPORISATION VAPOROSITIES VAPOROUSNESS VASOPRESSORS ZOANTHROPIES ZOOGRAPHISTS ZOOPLANKTERS ZOOPLANKTONS ZOOSPERMATIC ZOOSPORANGIA ZOOTHERAPIES