Impoverish rhymes with:
barish, barrish, bearish, boorish, buresh, cherish, farish, farrish, garish, gerrish, irish, maresh, marish, moorish, morrish, nightmarish, parish, parrish, perish
Impoverish sounds like:
imburgia, impairs, imperious, impoverishes, imprecise, impress, impresses, infers, inverse, invirase