11 letters
- hypersaline20
- hypersexual27
- hyperspaces24
- hyperstatic21
- hypersthene21
- hypertonias19
- hypertrophy25
- iconoscopes21
- impeachable26
- impeachment26
- impecunious23
- impedimenta22
- impediments22
- impenitence22
- imperatives21
- imperfectly26
- imperforate20
- imperialism21
- imperialist18
- imperilling22
- imperilment22
- imperiously21
- impermanent22
- impermeable24
- impersonate18
- impertinent19
- impetrating20
- impetration18
- impetuosity20
- impetuously22
- inappetence22
- incompetent22
- independent19
- inexpedient24
- inexpensive27
- inoperative19
- inspections19
- insuperable20
- insuperably22
- intemperate18
- interdepend18
- interlapped20
- interlopers16
- intersperse15
- introspects18
- ipecacuanha24
- jasperwares26
- kinetoscope22
- landscapers20
- laparoscope21
- leafhoppers23
- leukopenias21
- livetrapped23
- lockkeepers26
- loudspeaker21
- lycanthrope23
- maxillipeds27
- meperidines19
- mesopelagic23
- microampere23
- micropipets23
- microscopes23
- milliampere22
- minesweeper21
- misanthrope20
- misperceive24
- misshapenly23
- misspeaking24
- misspelling22
- misspending22
- monoterpene19
- mucopeptide25
- mudskippers26
- nephoscopes23
- newspapered22
- newspersons19
- nightscopes22
- nonoperatic19
- nonpersonal18
- nonspeakers20
- nonspeaking23
- nonspecific25
- octapeptide21
- openability21
- openhearted18
- openmouthed22
- operability20
- operagoings19
- operational16
- operatively21
- operculated20
- operettists14
- operoseness15
- orthopedics20
- orthopedist17
- outcapering21
- outcompeted22
- outcompetes21
- outperforms21
- outspeaking22
- outspeeding19
- outspelling20
- outspending20
- outstripped19
- overcropped25
- overoperate18
- overpedaled21
- overpeopled23
- overpeoples22
- overslipped23
- overspender20
- overstepped22
- overtrumped23
- paperbacked28
- paperboards21
- paperbounds23
- paperhanger22
- papermakers24
- papermaking27
- paperweight24
- paradropped22
- paratrooper17
- pauperizing30
- peacefuller23
- peacekeeper24
- peacemakers24
- peacemaking27
- peacockiest24
- pearlescent19
- peasantries15
- peashooters16
- peccadillos23
- peckerwoods25
- pectination19
- peculations20
- peculiarity21
- pecuniarily22
- pedagogical23
- pederasties15
- pedestaling19
- pedestalled18
- pedestrians16
- pediatrists15
- pedicellate20
- pediculates20
- pediculoses20
- pediculosis20
- pedicurists19
- pedogeneses18
- pedogenesis18
- pedogenetic21
- pedological22
- pedologists18
- pedophiliac24
- pedophilias21
- pedunculate22
- peevishness21
- pejoratives27
- pelargonium22
- pelletising19
- pelletizers25
- pelletizing28
- pellitories16
- pelycosaurs21
- pemphiguses25
- pencillings23
- pendentives21
- penetrances19
- penetrating18
- penetration16
- penetrative19
- penicillate20
- penicillins21
- penicillium24
- penitential17
- penmanships24
- pennyroyals21
- pennyweight25
- pennyworths23
- penological22
- penologists18
- pensionable20
- pensionless17
- pensiveness20
- pentagonals19
- pentahedral19
- pentahedron19
- pentamerous19
- pentameters18
- pentamidine20
- pentaploids20
- pentaploidy22
- pentarchies20
- pentathlete18
- pentathlons19
- pentavalent21
- pentazocine28
- pentlandite18
- pentstemons19
- penultimate20