A suffix indicating that the substance, in the name of which it appears, is a ketone; as, acetone.A termination indicating that the hydrocarbon to the name of which it is affixed belongs to the fourth series of hydrocarbons, or the third series of unsaturated hydrocarbonsl as, nonone.
Vogais: oe
Consoantes: n
one, on, one-on-one, oni, ono, ony, oon, own, one-man, one-way.