Oo, one.
Or, before.
Ordenaryes, [87], ordinances.
Ore, [78], mercy, grace, favour. “Thyn ore,” a common expression, signifying “with thy favour.” See Chaucer’s Canterbury Tales, ed. Tyrwhitt, v. 3724, and notes.
Ortografye, [189], orthography.
Ostage, [147], hostage, lodging.
Over, [385], too.
Overest, [307], uppermost.
Over-throwyht, [74], overthrows.
Ovyr-lede, [262], over-reach, overbear. “Do not the people oppresse, nor overlede,” Lydgate’s translation of Boccace, v. 104.