Yoast rhymes with:
yost, boast, coast, coste, diagnosed, droste, engrossed, ghost, grossed, host, ivory-coast, khost, most, ost, post, riposte, roast, toast, toste, voest, woeste, yost
Yoast sounds like:
yacht, yagoda, yasuda, yeast, yest, yoest, yokado, yoked, yokota, yoshida, yost, yust