Frigates rhymes with:
frigate's, frigate's, bigots, frigate's, gigot's, spigots, agates, bigots, delegate's, ergot's, ergots, frigate's, gigot's, gorgets, ingots, legates, maggots, mcnuggets, nuggets, spigots, superdelegates, surrogates, target's, targets
Frigates sounds like:
fabricates, first's, firsts, forecasts, foreshadows, forest's, forests, forgets, forsythias, fractious, freightways, frigate's, frosts, fructose