Pertaining rhymes with:
ascertaining, entertaining, abstaining, ascertaining, attaining, containing, detaining, entertaining, maintaining, obtaining, retaining, staining, sustaining
Pertaining sounds like:
parading, paradyne's, pardoning, pardons, parting, partitioning, partitions, partying, pertains, pirating, porting, portions, predominance, preteens, pretense, pretenses, prodding, protein's, proteinaceous, proteins, proton's, protons, prudence, prudency, puritans