10-letter words containing o, p, i, l, a
- notaphilic — of or pertaining to notaphily
- nyctalopia — night blindness.
- nyctalopic — (medicine) Unable to see clearly in low light; night-blind; suffering from nyctalopia.
- occipitals — Plural form of occipital.
- occupiable — to take or fill up (space, time, etc.): I occupied my evenings reading novels.
- octaploidy — the fact of having or containing eight groups or sets of chromosomes
- oenophilia — a person who enjoys wines, usually as a connoisseur.
- olanzapine — An antipsychotic drug used to treat schizophrenia and bipolar disease etc.
- oligophagy — the condition of feeding on a limited range of foodstuffs, esp plants
- oojamaflip — a thing whose name is temporarily forgotten
- opalescing — Present participle of opalesce.
- ophiolater — a person who worships snakes
- ophiolatry — the worship of snakes.
- ophthalmia — inflammation of the eye, especially of its membranes or external structures.
- ophthalmic — of or relating to the eye; ocular.
- oppilative — obstructive; blocking
- optatively — In an optative way.
- optimality — The property of being optimal.
- optionable — the power or right of choosing.
- optionally — left to one's choice; not required or mandatory: Formal dress is optional.
- outleaping — Present participle of outleap.
- outplaying — Present participle of outplay.
- paedophile — an adult who is sexually attracted to young children.
- pair royal — Cribbage. a set of three cards of the same denomination, worth six points.
- palaeolith — a stone tool dating to the Palaeolithic
- palaeozoic — of, denoting, or relating to an era of geological time that began 600 million years ago with the Cambrian period and lasted about 375 million years until the end of the Permian period
- palagonite — a yellow basaltic glass
- pali canon — a collection of scriptures, originally recorded from oral traditions in the 1st century b.c., divided into one of three parts (Pitaka) sermons () the rules of the Buddhist order () and several treatises on philosophy and psychology ()
- palimscope — a hand instrument that produces concentrated ultraviolet light for reading palimpsests and other research materials.
- palindrome — a word, line, verse, number, sentence, etc., reading the same backward as forward, as Madam, I'm Adam or Poor Dan is in a droop.
- palinopsia — a visual disorder in which the patient perceives a prolonged afterimage
- palliation — to relieve or lessen without curing; mitigate; alleviate.
- panic bolt — a bar that spans an emergency exit door on its interior and opens the latch when pressure is applied.
- papulation — the formation or development of papules
- parabolize — to form as a parabola or paraboloid.
- paraboloid — a surface that can be put into a position such that its sections parallel to at least one coordinate plane are parabolas.
- paralation — PARALlel reLATION. Sabot, MIT 1987. A framework for parallel programming. A "field" is an array of objects, placed at different sites. A paralation is a group of fields, defining nearness between field elements. Operations can be performed in parallel on every site of a paralation.
- paralogism — argument violating principles of valid reasoning.
- paralogize — to draw conclusions that do not follow logically from a given set of assumptions.
- parapodial — of, relating to, or resembling a parapodium
- pareidolia — the imagined perception of a pattern or meaning where it does not actually exist, as in considering the moon to have human features
- parlormaid — a maid who takes care of a parlor, answers the door, waits on guests, etc.
- parrotlike — any of numerous hook-billed, often brilliantly colored birds of the order Psittaciformes, as the cockatoo, lory, macaw, or parakeet, having the ability to mimic speech and often kept as pets.
- parsonical — a member of the clergy, especially a Protestant minister; pastor; rector.
- partial to — fond of; having a liking for
- passiflora — a plant of the genus Passiflora
- pathologic — of or relating to pathology.
- patrifocal — focused or centered on the father.
- patrilocal — virilocal.
- patrocliny — inheritance in which the traits of the offspring are derived primarily from the paternal parent (opposed to matrocliny).