Here's what rhymes with assiduement.
non gnawn don gone von con dawn lawn yon hon wan bon fawn han pawn schon yawn bonne khan sawn sonne vpon tenon faun john upon drawn baton denouement spawn swan yuan npon begone brawn pecan prawn thereon thereupon salon pantheon whereon echelon chaperon chiffon aileron amazon epsilon hereon predawn autobahn lasagne neocon trimaran outdrawn undergone withdrawn whereupon polygon automaton foregone hexagon marathon octagon paragon redrawn forgone hereupon overdrawn pentagon antiphon tarragon woebegone carillon leprechaun heptagon upsilon emoticon methadon phenomenon lexicon positron rapprochement mastodon cordovan frogspawn pantechnicon Words that almost rhyme with assiduement
mom nom mam long wrong com song calm bomb palm bom homme vom balm gong rom som tom dong thong pom pong tong bong iamb along belong quam throng prom prong twang embalm qualm sarong mahjong becalm dingdong supermom strong prolong intercom aplomb pogrom singsong salaam consomme erelong nightlong lifelong cardamom yearlong firebomb livelong morn mourn born corn borne torn worn barn horn warn yarn thorn shorn darn porn tarn lorn scorn sworn adorn unborn timeworn unworn forlorn reborn outworn unicorn forborne peppercorn lowborn firstborn stillborn waterborne careworn forewarn forsworn lovelorn foresworn sweetcorn