os, decl., [42].
-os, later -us in 2d decl., [23].
-ōs, later -or in 3d decl., [36], 1.
—— -ōs, Greek nouns, 2d decl. in, [27].
-ōsus, form of suffix, [151], 3.
ovis, decl., [38], 1.
Oxymoron, [375], 2.
P.
p, pron., [3], 3;
—— by assimilation, [8], 4;