Blacken rhymes with:
glacken, slacken, bakken, bracken, chacon, glacken, hakon, machen, macken, mccracken, mccrackin, mcmackin, mcmakin, slacken
Blacken sounds like:
balcom, balcony, balkan, balkcom, balkin, ballgame, balsam, balsamo, balzano, belgacom, belgian, belgium, belkacem, belkin, bellissimo, belson, bialkin, bilson, blackham, blackman, blackmon, blackmun, blackson, blakeman, blakeney, blakenham, blakney, blasini, blazina, bleakney, blechman, blegen, blossom, blowgun, bloxham, bloxom, bloxsom, bohlken, bolcom, bologna, bolson, bulson, bylsma