Toasts rhymes with:
boasts, coast's, coasts, ghosts, host's, hosts, jostes, post's, posts, roasts
Toasts sounds like:
tactic, tactics, takeshita's, taoists, tastes, test's, testes, tests, tests', texts, thickets, thoughts, ticket's, tickets, tights, toussaud's, tsetse, tuesday's, tuesdays, tussaud's, tuxedos, twists