Plastics rhymes with:
thermoplastics, thermoplastics, gymnastics, onomastics, thermoplastics, acoustics, agnostics, ballistics, characteristics, criminalistics, diagnostics, domestics, gymnastics, heuristics, linguistics, logistics, mystics, onomastics, statistics, statistics', thermoplastics
Plastics sounds like:
palisades, placetas, placid's, plastic, plisetskaya, polecats, populists, publicists