Tappet rhymes with:
chaput, carpet, chaput, clampett, despot, muppet, philpot, philpott, puppet, snippet, tippet, trumpet
Tappet sounds like:
tabitha, taffeta, taft, taped, tapped, teapot, tebbit, tefft, tepid, theft, thibadeau, thibedeau, thibodeau, thiebaud, tibbett, tibet, tibidow, tidbit, tifft, tift, tipped, tippet, tippett, tippit, tippitt, tiptoe, tiptoed, toft, tofte, topete, topped, towboat, tuft, tufte, tufted, tvedt, tveit, typed, typhoid, typified