Pertains rhymes with:
entertains, attains, contains, entertains, maintains, obtains, retains, staines, stains, sustains
Pertains sounds like:
parading, paradyne's, pardoning, pardons, parting, partitioning, partitions, partying, pertaining, pirating, porting, portions, predominance, preteens, pretense, pretenses, prodding, protein's, proteinaceous, proteins, proton's, protons, prudence, prudency, puritans