7-letter words containing i, o, s
- oedipus — a king of Thebes, the son of Laius and Jocasta, and the father by Jocasta of Eteocles, Polynices, Antigone, and Ismeme: as was prophesied at his birth, he unwittingly killed his father and married his mother and, in penance, blinded himself and went into exile.
- offices — Plural form of office.
- offings — Plural form of offing.
- offside — (of a player in certain sports) occupying an unlawful position on the field, in particular.
- offsite — Away from a main location; in a place not owned by a particular organisation.
- ogreish — a monstrously ugly, cruel, or barbarous person.
- ogreism — an occurrence of behaviour characteristic of an ogre
- oilcans — Plural form of oilcan.
- oilfish — a snake mackerel, Ruvettus pretiosus, commonly inhabiting deep, marine waters.
- oiliest — Superlative form of oily.
- oilsand — Alternative spelling of oil sand.
- oilseed — any of several seeds, as the castor bean, sesame, or cottonseed, from which an oil is expressed.
- oilskin — a cotton fabric made waterproof by treatment with oil and used for rain gear and fishermen's clothing.
- olefins — Plural form of olefin.
- oligist — (mineralogy) Hematite or specular iron ore.
- olingos — Plural form of olingo.
- ologies — Plural form of ology.
- ologist — an expert or student in an academic branch of learning
- ominous — portending evil or harm; foreboding; threatening; inauspicious: an ominous bank of dark clouds.
- omnibus — bus1 (def 1).
- on-site — accomplished or located at the site of a particular activity or concern: on-site medical treatment for accident victims.
- onanism — withdrawal of the penis in sexual intercourse so that ejaculation takes place outside the vagina; coitus interruptus.
- onanist — withdrawal of the penis in sexual intercourse so that ejaculation takes place outside the vagina; coitus interruptus.
- onassis — Aristotle Socrates, 1906–75, Greek businessman, born in Turkey.
- onesies — Plural form of onesie.
- oneties — (nonce) The second decade of a century: the 1910s, the 2010s, etc. The tens.
- onitsha — a city in SW Nigeria, on the Niger River.
- onliest — being the single one or the relatively few of the kind: This is the only pencil I can find.
- ooftish — any kind of money or cash
- oolites — Plural form of oolite.
- opiates — Plural form of opiate.
- opioids — Plural form of opioid.
- opposit — Archaic form of opposite.
- opsonic — of, relating to, or influenced by opsonin; capable of promoting phagocytosis.
- opsonin — a constituent of normal or immune blood serum that makes invading bacteria more susceptible to the destructive action of the phagocytes.
- options — Plural form of option.
- oralism — the theory, practice, or advocacy of education for the deaf chiefly or exclusively through lipreading, training in speech production, and training of residual hearing.
- oralist — an advocate of oralism.
- orbison — Roy, 1936–88, U.S. rock and roll singer and songwriter.
- orchids — Plural form of orchid.
- orchils — Plural form of orchil.
- ordains — Third-person singular simple present indicative form of ordain.
- ordines — Roman Catholic Church. a booklet containing short and abbreviated directions for the contents of the office and Mass of each day in the year.
- orgiast — One who celebrates orgies.
- orients — Third-person singular simple present indicative form of orient.
- origins — Plural form of origin.
- orioles — Plural form of oriole.
- orisons — Plural form of orison.
- orosius — Paulus [paw-luh s] /ˈpɔ ləs/ (Show IPA), flourished 5th century a.d, Spanish theologian and historian.
- orphism — the religious or philosophical system of the Orphic school.