Thinker rhymes with:
freethinker, brinker, drinker, freethinker, kinker, klinker, linker, pinker, rinker, sinker, slinker, tinker, treblinka, winker
Thinker sounds like:
tamashiro, tanger, tanker, tannhauser, tanqueray, tanzer, teenager, tenncare, tenzer, timeshare, timisoara, tinajero, tincher, tinker, tinkerer, toymaker, tumacoceri