There are 575 nine-letter words containing A, D, I and P, https://www.bestwordlist.com/c/a/4/9letterwordswithadip.htm ACIDOPHIL ACTINOPOD ADAPTIONS ADEMPTION ADIAPHORA ADIPOCERE ADIPOCYTE ADIPOSITY ADOPTIONS ADOPTIOUS ADSCRIPTS AIRSPEEDS ALOPECOID AMIDSHIPS AMPHIPODS AMPLIDYNE AMPLIFIED AMPLITUDE ANEUPLOID ANGUIPEDE ANGUIPEDS ANTIPODAL ANTIPODES APARTHEID APERIODIC APHETISED APHETIZED APHICIDES APHIDIANS APHIDIOUS APHORISED APHORIZED APHRODITE APODICTIC APPENDING APPETISED APPETIZED APPLIQUED APPOINTED APPRAISED APRICATED APSIDIOLE APTITUDES ASCLEPIAD ASPHYXIED ASPIDIOID ASPIRATED ATROPHIED AUDIOPHIL AUDIOTAPE AUDIPHONE AUTOPSIED BARDSHIPS BEDIAPERS BEDRAPING BEPAINTED BEPRAISED BIPEDALLY BIPYRAMID BITMAPPED CADETSHIP CALIPERED CAMPODEID CANDLEPIN CAPITATED CAPONISED CAPONIZED CAPRIFIED CAPRIOLED CAPTAINED CAPTIONED CARBIDOPA CHIPBOARD CISPADANE CLIPBOARD COMPANIED COMPENDIA CRISPATED CRISPHEAD CRYPTADIA CUSPIDATE DAMPENING DANDIPRAT DAUPHINES DAYSPRING DEANSHIPS DECAMPING DEIPAROUS DELAPSING DELAPSION DELPHINIA DEPAINTED DEPARTING DEPILATED DEPILATES DEPILATOR DEPLANING DEPRAVING DEPRAVITY DEPRIVALS DESPAIRED DESPAIRER DESPISALS DIAGLYPHS DIAGRAPHS DIAPASONS DIAPAUSED DIAPAUSES DIAPENTES DIAPERING DIAPHONES DIAPHONIC DIAPHRAGM DIAPHYSES DIAPHYSIS DIAPIRISM DIAPYESES DIAPYESIS DIAPYETIC DIASCOPES DIASPORAS DIASPORES DIASPORIC DIATROPIC DIAZEPAMS DIDAPPERS DIGIPACKS DIGRAPHIC DIOPTASES DIOPTRATE DIPLEGIAS DIPLOMACY DIPLOMAED DIPLOMATA DIPLOMATE DIPLOMATS DIPLONEMA DIPLOPIAS DIPTERANS DISAPPEAR DISPACING DISPARAGE DISPARATE DISPARITY DISPARKED DISPARTED DISPAUPER DISPEACES DISPERSAL DISPLACED DISPLACER DISPLACES DISPLANTS DISPLAYED DISPLAYER DISPLEASE DISPOSALS DISPRAISE DISPREADS DISPROVAL DISPUTANT DISREPAIR DISSIPATE DOGNAPING DOPAMINES DRAGSTRIP DRAINPIPE DRAPERIED DRAPERIES DREPANIDS DREPANIUM DROPSICAL DUPLICAND DUPLICATE DYSPEPSIA DYSPHAGIA DYSPHAGIC DYSPHASIA DYSPHASIC DYSPHONIA DYSPHORIA DYSPLASIA DYSPRAXIA DYSPRAXIC DYSTOPIAN DYSTOPIAS EAVESDRIP EIDOGRAPH EPEDAPHIC EPICARDIA EPICEDIAL EPICEDIAN EPIDERMAL EPIDURALS EPISODIAL EPITAPHED EQUIPAGED EUPATRIDS EUPHAUSID EXPANDING EXPLAINED FILOPODIA FIREDAMPS FLIPBOARD GLIDEPATH GUARDSHIP HANDGRIPS HANDICAPS HANDPICKS HANDPRINT HANDSPIKE HAPLOIDIC HARDSHIPS HEADPIECE HEADSHIPS HEPATISED HEPATIZED HEXAPLOID HEXAPODIC HIPPODAME HYPERACID HYPERARID HYPNOIDAL ICECAPPED IDEOGRAPH IDIOGRAPH IDIOPATHY IDIOPLASM IMPAINTED IMPANELED IMPASTOED IMPAVIDLY IMPEACHED IMPEARLED IMPEDANCE IMPLANTED IMPLEADED IMPLEADER INCLASPED INSPANNED INWRAPPED ISOPODANS JAPANISED JAPANIZED JASPIDEAN KIDNAPEES KIDNAPERS KIDNAPING KIDNAPPED KIDNAPPEE KIDNAPPER KLIPDASES LADYSHIPS LAIRDSHIP LAMPADIST LAMPYRIDS LANDSKIPS LANDSLIPS LAPIDATED LAPIDATES LAPIDEOUS LAPIDIFIC LAPIDISTS LEPORIDAE LIPREADER MEROPIDAN MIDSPACES MINDSCAPE MISADAPTS MISHAPPED MISPARSED MISPARTED MISPLACED MISPLAYED MISPLEADS MISSHAPED MISSPACED MONOPODIA MYRIAPODS NAUPLIOID NEPHRIDIA NYMPHALID OCTAPLOID OCTAPODIC OEDIPALLY OLYMPIADS OMPHALOID OPACIFIED OPHIDIANS OPPILATED OVERPLAID PACTIONED PADDLINGS PADISHAHS PADRONISM PAEDEUTIC PAEDIATRY PAGANISED PAGANIZED PAGINATED PAGODITES PAIDEUTIC PAILLARDS PALINODES PALISADED PALISADES PALLADIUM PALLIARDS PALLIATED PALLIDEST PALLIDITY PALMIPEDE PALMIPEDS PALUDINAL PALUDISMS PANDARING PANDATION PANDEMIAN PANDEMIAS PANDEMICS PANDERING PANDERISM PANELISED PANELIZED PANFISHED PANNIERED PANOPLIED PAPALISED PAPALIZED PARADIGMS PARADISAL PARADISES PARADISIC PARAGLIDE PARAMEDIC PARANOIDS PARAPODIA PARBOILED PARDONING PARISHADS PARODICAL PARODISTS PARODYING PAROTIDES PAROTOIDS PARRICIDE PARRIDGES PARTRIDGE PARULIDES PASSEPIED PASSIONED PATIENTED PATINATED PATINISED PATINIZED PATRIATED PATRICIDE PEARLISED PEARLIZED PEDAGOGIC PEDALIERS PEDALLING PEDANTISE PEDANTISM PEDANTIZE PEDATIFID PEDIATRIC PEDICULAR PEDIPALPI PEDIPALPS PEDLARIES PEDOCALIC PENALISED PENALIZED PEPONIDAS PEPTIDASE PERIDINIA PERIODATE PERRADIAL PERRADIUS PERTAINED PERVADING PERVIATED PETALODIC PHACOIDAL PHALANGID PHILANDER PHYLLODIA PICADILLO PICADORES PICCADILL PICKADILL PICKADILS PICOFARAD PICOWAVED PIERHEADS PIGHEADED PIGTAILED PILCHARDS PILLHEADS PILONIDAL PINACOIDS PINAFORED PINAKOIDS PINBALLED PINBOARDS PINDAREES PINELANDS PINHEADED PINNACLED PINTADERA PINTADOES PINTAILED PISSHEADS PIXELATED PIXILATED PLACIDEST PLACIDITY PLAIDINGS PLANESIDE PLANETOID PLANISHED PLANULOID PLASMODIA PLASMOIDS PLATINOID PLATITUDE PLAYFIELD PLEADINGS PODIATRIC POINADOES POLARISED POLARIZED POLYACIDS POLYAMIDE PONIARDED POSIGRADE PRACTICED PRACTISED PRAEDIALS PRAELUDIA PRAESIDIA PREADAMIC PREADMITS PREAUDITS PREDACITY PREDATING PREDATION PREDATISM PREDATIVE PREDICANT PREDICATE PREDIKANT PREFADING PRELUDIAL PREORDAIN PRESIDIAL PREVAILED PRIMORDIA PRINTHEAD PRIVADOES PRODIGALS PROSODIAL PROSODIAN PSALMODIC PSEUDAXIS PTYALISED PTYALIZED PUMICATED PYCNIDIAL PYINKADOS PYRALIDID PYRAMIDAL PYRAMIDED PYRAMIDES PYRAMIDIA PYRAMIDIC PYRAMIDON PYRIDOXAL QUADRICEP RAINDROPS RAMPICKED RAPIDNESS REAPPLIED REDISPLAY REPAINTED REPRIMAND REPUDIATE RESPADING RHAMPHOID RHAPHIDES RHAPSODIC RHIPIDATE RIPRAPPED SANDPILES SANDPIPER SANDSPITS SAPIDLESS SAPIDNESS SAPODILLA SAPPHIRED SATINPODS SCALDSHIP SCAPHOIDS SEPADDING SHIPBOARD SHIPLOADS SHIPYARDS SIDEPATHS SKALDSHIP SLIPCASED SPADASSIN SPADEFISH SPADELIKE SPADILLES SPADILLIO SPADILLOS SPANDRILS SPASMODIC SPECIATED SPERMATID SPIDERMAN SPIKENARD SPIRALLED SPOLIATED SPONDAICS SPORIDIAL SPREADING SPRINGALD STANDPIPE STAPEDIAL STAPEDIUS SUPINATED SYMPODIAL SYNAPSIDS TAILPIPED TAPIROIDS TARSIPEDS TEPIDARIA THERAPSID TINPLATED TRAPEZOID TREPIDANT TYPHOIDAL UNAPPLIED UNDERPAID UNDRAPING UNHAPPIED UNPAINTED UNPALSIED UNPLAINED UNPLAITED UNPRAISED UPBRAIDED UPBRAIDER UPDARTING UPDRAWING UPGRADING UPHAUDING UPLANDISH UPLEADING UPLOADING UPSADAISY UPTRAINED VAPIDNESS VAPORISED VAPORIZED VARITYPED VIDEOTAPE WAMPISHED WARDSHIPS WHIPSAWED WHITEDAMP WINDPACKS XIPHOIDAL