Yonker rhymes with:
conquer, jonker, waronker, anchor, anker, banker, benker, betancur, bonker, brinker, brunker, bunker, canker, clunker, conquer, danker, denker, drinker, dunker, freethinker, hanker, hunker, jonker, junker, kinker, klinker, lenker, linker, manker, pinker, plunker, rancor, ranker, reconquer, rinker, sanker, schenker, schlenker, schwenker, shanker, shenker, shlenker, sinker, slinker, spelunker, supertanker, tanker, thinker, tinker, treblinka, waronker, wenker, winker, younker, yunker, zenker, zunker
Yonker sounds like:
yamashiro, yinger, younger, younker, yunker