There are 651 eleven-letter words containing A, 2I, P and S, https://www.bestwordlist.com/c/a/5/11letterwordswithaiips.htm ACIDOPHILES ACIDOPHILUS ADIAPHORISM ADIAPHORIST ADIPOSITIES ADMIRALSHIP ADOPTIANISM ADOPTIANIST ADOPTIONISM ADOPTIONIST ADSCRIPTION ADVISERSHIP AEDILESHIPS AIRMANSHIPS AMPHIBOLIES AMPHIGORIES AMPHIGOURIS AMPHIPHILES AMPHIPLOIDS AMPHISCIANS AMPICILLINS AMPLIATIONS ANADIPLOSIS ANISOTROPIC ANTICIPANTS ANTICIPATES ANTIPARTIES ANTIPATHIES ANTIPATHIST ANTIPHONIES ANTIPHRASIS ANTIPYRESIS ANTIPYRINES ANTISEPTICS ANTISPASTIC APHIDICIDES APHRODISIAC APHRODISIAS APOLITICISM APOLOGISING APOSIOPESIS APOSIOPETIC APPARITIONS APPETITIONS APPOSITIONS APPOSITIVES APRICATIONS APRIORITIES ARTISANSHIP ASCRIPTIONS ASEPTICISED ASEPTICISES ASEPTICISMS ASEPTICIZED ASEPTICIZES ASPIDISTRAS ASPIRATIONS AUDIOPHILES AUDIOTYPIST AUDITORSHIP AUSPICATING AVOIRDUPOIS BAILIESHIPS BAILIFFSHIP BAILLIESHIP BAPTISTRIES BASIDIOCARP BASOPHILIAS BICUSPIDATE BIOGRAPHIES BIOGRAPHISE BIOPHYSICAL BIOPIRACIES BIOPLASTICS BIPARTISANS BIPEDALISMS BIPINNARIAS BIPOLARISED BIPOLARISES BIPOLARIZES BLEPHARITIS CACOEPISTIC CAIPIRINHAS CANOPHILIAS CANOPHILIST CAPILLAIRES CAPILLARIES CAPITALISED CAPITALISES CAPITALISMS CAPITALISTS CAPITALIZES CAPITATIONS CAPRICCIOSO CAPSULISING CAPSULIZING CAPTAINCIES CAPTAINRIES CAPTAINSHIP CAPTIVITIES CASSIOPEIUM CHINQUAPINS CORIVALSHIP CRISPATIONS CUSPIDATION CYNOPHILIAS DEPILATIONS DEPRAVITIES DESIPRAMINE DIAPHORESIS DIAPOPHYSIS DIAPOSITIVE DIASPORISTS DIASTROPHIC DIATROPISMS DICEPHALISM DILAPIDATES DIPEPTIDASE DIPHTHERIAS DIPLOMACIES DIPLOMATICS DIPLOMATISE DIPLOMATIST DIPSOMANIAC DIPSOMANIAS DISAPPLYING DISAPPOINTS DISCIPLINAL DISPARAGING DISPARITIES DISPASSIONS DISPATCHING DISPLANTING DISPLEASING DISPRAISERS DISPRAISING DISPREADING DISPUTATION DISPUTATIVE DISSIPATERS DISSIPATING DISSIPATION DISSIPATIVE DISSIPATORS ELLIPSOIDAL ELLIPTICALS EMANCIPISTS EMPATHISING EMPHASISING EMPHASIZING EPICARDIUMS EPICRANIUMS EPIDIASCOPE EPIGASTRIAL EPIGASTRIUM EPIGRAPHIES EPIGRAPHIST EPISPASTICS EPISTAXISES EPISTOLICAL EPITAPHISTS ESOPHAGITIS ESPALIERING EUPHAUSIIDS EUROPHILIAS EXPANSIVITY EXPIRATIONS EXPISCATING EXPISCATION FIRESCAPING FISSIPARISM FISSIPARITY FISSIPAROUS FLIPPANCIES FRANGIPANIS GRAPHITISED GRAPHITISES GRAPHITIZES HAGIOSCOPIC HAIRSPRINGS HALOPHILIES HARUSPICIES HEMIANOPIAS HEMIANOPSIA HEMIPLEGIAS HEMOPHILIAS HEPARINISED HEPARINISES HEPARINIZES HEPATITIDES HEPATITISES HIPPIATRICS HIPPIATRIES HIPPIATRIST HIPPODAMIST HISPANICISE HISPANICISM HISPANICIZE HISPANIDADS HOSPITALISE HOSPITALIST HOSPITALITY HOSPITALIZE IDEOPRAXIST IDIOPATHIES IDIOPLASMIC IMIPRAMINES IMPAIRMENTS IMPALUDISMS IMPANATIONS IMPARADISED IMPARADISES IMPASSIONED IMPASSIVELY IMPASSIVITY IMPASTATION IMPATIENCES IMPERATIVES IMPERIALISE IMPERIALISM IMPERIALIST IMPLAUSIBLE IMPLAUSIBLY IMPRESARIOS IMPRIMATURS IMPROVISATE IMPUISSANCE IMPUTATIONS INAPTITUDES INCAPACIOUS INDAPAMIDES INSPIRATION INSPIRATIVE INSPIRATORS INSPIRATORY INSPISSATED INSPISSATES INSPISSATOR INTERPARISH INTERSPINAL INWRAPPINGS IPRONIAZIDS IPSILATERAL ISAPOSTOLIC ISODIAPHERE ISOMETROPIA ISOPLUVIALS JANITORSHIP JASPERISING JASPERIZING KAISERSHIPS KIDNAPPINGS KINESIPATHS KINESIPATHY LAPIDARISTS LAPIDATIONS LIFEMANSHIP LIPIDOPLAST LIPOMATOSIS LIPREADINGS MAINPRISING MAINSPRINGS MAINTOPSAIL MALPOSITION MARLINSPIKE MAXILLIPEDS MESSIAHSHIP MIDSHIPMATE MISADAPTING MISAPPLYING MISCAPTIONS MISEMPHASIS MISPAINTING MISPATCHING MISPHRASING MISPLANNING MISPLANTING MISPLEADING MISPLEASING MISPRAISING MISSPEAKING MISSTAMPING MULTIPHASIC MULTISPIRAL NEOPHILIACS NEVIRAPINES NONPARITIES NOTAPHILIES NOTAPHILISM NOTAPHILIST OBSTIPATION OPERATISING OPINIONATES OPPILATIONS OPSIMATHIES OPTIMALISED OPTIMALISES OPTIMALIZES OVIPARITIES PACIFICATES PACIFICISMS PACIFICISTS PACKETISING PAEDIATRICS PAEDIATRIES PAEDIATRIST PAGINATIONS PAINKILLERS PAINSTAKING PAKIRIKIRIS PALILLOGIES PALINOPSIAS PALISADOING PALLETISING PALLIATIONS PALLIATIVES PALLIDITIES PALMISTRIES PANARITIUMS PANFISHINGS PANISLAMIST PANTHEISTIC PANTILINERS PANTOMIMIST PARADISICAL PARAKITINGS PARALEIPSIS PARAPHILIAS PARAPHILICS PARASAILING PARASITICAL PARASITISED PARASITISES PARASITISMS PARASITIZED PARASITIZES PARASITOIDS PARASITOSIS PARASKIINGS PARASUICIDE PARCIMONIES PAREIDOLIAS PARISHIONER PARMACITIES PARMIGIANOS PAROTIDITIS PAROTITIDES PAROTITISES PARSIMONIES PARTIALISED PARTIALISES PARTIALISMS PARTIALISTS PARTIALIZES PARTICIPLES PASIGRAPHIC PASQUILLING PASSIBILITY PASSIVATING PASSIVATION PASSIVITIES PATERNITIES PATINATIONS PATISSERIES PATRIALISED PATRIALISES PATRIALISMS PATRIALIZES PATRIATIONS PATRICIATES PATRILINIES PATRIMONIES PATRIOTISMS PATRISTICAL PATRONISING PAUPERISING PECTISATION PECULIARISE PEDANTICISE PEDANTICISM PEDANTISING PEDIATRISTS PEDOPHILIAS PEPSINATING PEPTISATION PERICLASTIC PERIDINIANS PERIGASTRIC PERIODICALS PERIPETEIAS PERIPHRASIS PERIPLASMIC PERISELENIA PERISTALITH PERISTALSIS PERISTALTIC PERISTOMIAL PERSICARIAS PERVICACIES PHALLICISMS PHALLICISTS PHALLOIDINS PHARISAICAL PHARISAISMS PHARISEEISM PHARYNGITIS PHILATELIES PHILATELIST PHILAVERIES PHILIPPINAS PHILOXENIAS PHTHIRIASES PHTHIRIASIS PHYSIATRICS PHYSIATRIES PHYSIATRIST PHYSICALISM PHYSICALIST PHYSICALITY PHYSICALIZE PHYSICIANCY PHYSICIANER PIANISSIMOS PICCADILLOS PICCALILLIS PICHICIAGOS PICKADILLOS PIETISTICAL PILEORHIZAS PILGARLICKS PILGRIMAGES PILOCARPINS PINNATISECT PIPERAZINES PIPSISSEWAS PISCATORIAL PISCATRIXES PISCIFAUNAE PISCIFAUNAS PITUITARIES PIXELATIONS PIXILATIONS PIZZAZZIEST PLACIDITIES PLAGIARISED PLAGIARISER PLAGIARISES PLAGIARISMS PLAGIARISTS PLAGIARIZES PLAISTERING PLANARITIES PLASTICINES PLASTICISED PLASTICISER PLASTICISES PLASTICIZED PLASTICIZER PLASTICIZES PLASTICKIER PLASTILINAS PLATINISING PLAYLISTING PLEBEIANISE PLEBEIANISM PLEINAIRISM PLEINAIRIST PLEIOCHASIA PLEIOTAXIES PLURALISING PLURALISTIC PLURALITIES PLURISERIAL PODIATRISTS POIGNANCIES POINSETTIAS POLITICIANS POLYDIPSIAS PONTIFICALS PORTRAITIST POSTEXILIAN POSTLIMINIA PRACTICIANS PRAESIDIUMS PREACHIFIES PREDACITIES PREINVASION PRELATISING PREVISIONAL PRIMALITIES PRIMAQUINES PRIMARINESS PRIMATESHIP PRIMIPAROUS PRIMORDIALS PRINCIPATES PRISMATICAL PRISMATOIDS PRIVATISERS PRIVATISING PRIVATIZERS PROBABILISM PROBABILIST PROCACITIES PRODIGALISE PROFANITIES PROPITIATES PROSAICISMS PROSTATITIS PROVINCIALS PROVISIONAL PROVITAMINS PRUSSIANISE PRUSSIANIZE PSITTACINES PSITTACOSIS PSITTACOTIC PSYCHIATRIC PUGNACITIES PULSATILITY PURITANISED PURITANISES PURITANISMS PURITANIZES PUSCHKINIAS PYRAMIDIONS PYRAMIDISTS RADIOSCOPIC RAPTURISING REBAPTISING REPAINTINGS REPRIVATISE RESPIRATION RETINISPORA RIFAMPICINS SAILPLANING SAINTPAULIA SALPINGITIC SALPINGITIS SAPONIFIERS SAPONIFYING SAPPHIRINES SAPROBIOTIC SAPROBITIES SCALLOPINIS SCOPOPHILIA SCRIPTORIAL SEMIPRIVATE SEPIOSTAIRE SEPTICAEMIA SEPTICAEMIC SEPTICEMIAS SERIGRAPHIC SHIPLAPPING SIDEROPENIA SINUPALLIAL SITIOPHOBIA SITOPHOBIAS SKIASCOPIES SOCIOPATHIC SOPAIPILLAS SOPHISTICAL SPAGHETTINI SPANIELLING SPANIOLISED SPANIOLISES SPANIOLIZED SPANIOLIZES SPATIALISED SPATIALISES SPATIALIZED SPATIALIZES SPECIALISED SPECIALISER SPECIALISES SPECIALISMS SPECIALISTS SPECIALIZED SPECIALIZER SPECIALIZES SPECIALLING SPECIALTIES SPECIATIONS SPECIFIABLE SPECIFICATE SPERMICIDAL SPHAERIDIUM SPHRAGISTIC SPICULATION SPIFFLICATE SPIFLICATED SPIFLICATES SPINACHIEST SPINACHLIKE SPINIGRADES SPINSTERIAL SPINSTERIAN SPIRALIFORM SPIRALISERS SPIRALITIES SPIRALIZERS SPIRITUALLY SPIRITUALTY SPITBALLING SPOLIATIONS SPRINGTAILS STAPHYLINID STAPHYLITIS STIPENDIARY STIPENDIATE STIPULATING STIPULATION SUPERFICIAL SUPINATIONS SUPPLICAVIT SUSPICIONAL SUSPIRATION TAILSPINNED TEICHOPSIAS THERAPISING TIMEPASSING TOPOPHILIAS TOXIPHOBIAS TRAINEESHIP TRAITORSHIP TRANSPIRING TRICUSPIDAL TRIPARTISMS TRIPLETAILS TRIPLICATES TRIPUDIATES TRITANOPIAS TROPICALISE TROPISMATIC UNBAPTISING UNSPIRITUAL UPBRAIDINGS URINIPAROUS UTOPIANISED UTOPIANISER UTOPIANISES UTOPIANISMS UTOPIANIZES VAIVODESHIP VAMPIRISING VARITYPISTS VIVIPARISMS WEAPONISING WHIPLASHING XERISCAPING XIPHISTERNA