What rhymes with observe

1 Syllable
derv
2 Syllables
adverb, cowherb, curfew, curve, nerve, reverb, serve, swerve, verve, vervet
3 Syllables
burgrave, cervine, conserve, decurved, delmarva, deserve, disserve, incurve, innerve, laverne, observe, outcurve, preserve, recurve, reserve, subserve, unnerve
4 Syllables
unreserve