Apse,¶ lapse, elapse, relapse, perhaps, and the plurals of nouns and third persons singular present tense of verbs in AP.
APT.
Apt, adapt, etc. Rhymes, the preterites and participles of verbs in AP.
AQUE.
Opaque, plaque,¶ make, ache, break.
AR.
(As in "bar"), rhymes Czar,|| bar, car, far, jar, mar, par, tar, spar, scar, star, char, afar, debar, petar,§ unbar, catarrh, particular, perpendicular, secular, angular, regular, popular, singular, titular, vinegar, scimetar, calendar, avatar,|| cinnabar, caviare,|| are. (As in "war"), rhymes for, and perhaps bore, pour, etc.
ARB.
Barb, garb, rhubarb, etc.
ARCE.