6-letter words containing o, n, a, i
- romani — Romany.
- rosina — a female given name, Italian form of Rose.
- sagoin — a South American monkey
- saigon — a former country in SE Asia that comprised Vietnam S of about 17° N latitude; a separate state 1954–75; now part of reunified Vietnam. Capital: Saigon.
- siabon — a hybrid animal bred from a gibbon and a siamang.
- sialon — a very strong, corrosion-resistant ceramic used in the chemical industry
- siouan — an American Indian language family formerly widespread from Saskatchewan to the lower Mississippi, also found in the Virginia and Carolina piedmont, and including Catawba, Crow, Dakota, Hidatsa, Mandan, Osage, and Winnebago.
- talion — lex talionis.
- wanion — curse; vengeance.
- winona — a city in SE Minnesota, on the Mississippi.
- zonian — a U.S. citizen living in the Canal Zone.