Purists rhymes with:
tourists, aquarists, forest's, forests, guitarist's, guitarists, interests, psychiatrist's, psychiatrists, rainforests, tourists
Purists sounds like:
parachutes, parakeets, parasites, parasitic, perquisites, persecutes, persists, persuades, practice, practices, precedes, preceeds, preexists, prejudge, prejudice, prejudices, prerequisites, presides, presstek, presswoods, prestage, prestech, prestidge, prestige, prestigious, prestowitz, prestwich, preyistas, priest's, priestess, priests, proceeds, project's, projects, projects', prosecutes, prostatic, prostheses, prosthesis, prosthetic, prosthetics, prostitutes, puristic, pursuits