Pertained rhymes with:
ascertained, entertained, abstained, ascertained, attained, contained, detained, entertained, maintained, obtained, retained, self-contained, stained, sustained, unstained
Pertained sounds like:
pardoned, partitioned, pertinent, portend, portent, portinadi, predominant, predominate, predominated, preordained, pretend, pretended, prudent, prudente