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baton foregone positron spawn swan whereon fagon chiffon forgone hereupon overdrawn pecan aileron lasagne undergone withdrawn thereupon exon octagon paragon redrawn begone chaperon tenon amazon antiphon predawn tarragon carillon trimaran outdrawn methadon whereupon polygon automaton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