Leanest rhymes with:
cleanest, cleanest, keenest, kienast, machinist, meanest, abolitionist, accompanist, antagonist, arsonist, botanist, calvinist, cartoonist, chauvinist, cleanest, columnist, communist, conservationist, contortionist, determinist, dishonest, ernest, exhibitionist, expressionist, feminist, finest, gymnast, harnessed, honest, illusionist, impressionist, isolationist, jansenist, keenest, kienast, machinist, meanest, menaced, modernist, neoplatonist, obstructionist, organist, perfectionist, pianist, platonist, protagonist, soonest, sternest, unionist, violinist, witnessed
Leanest sounds like:
lamaist, lanai-city, lancet, lancit, lanctot, langguth, langseth, languid, languished, lanzet, launched, length, lengthy, leninist, linguist, linked, linquist, linscott, linseed, lionized, longed, longest, longitude, longshot, longuet, longwood, lunched, lunged, lynched