Ond, conj. but, only; prep. except. but
Onen, n. an ash, an ash tree
Oni, Onid, adv. not ? conj. if not, unless; except, until
Onidê, conj. otherwise, or else adv. if not so; is it not so?
Onis, conj. if not, unless, except: adv. not?
Onwydd, n. ash trees
Or, n. a limit; margin, brim: conj. if
Orch, n. a limit; rim
Oriad, n. a puffing, a panting
Oriadur, n. a time-piece, watch