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denouement positron echelon overdrawn antiphon epsilon carillon leprechaun heptagon cordovan trimaran upsilon frogspawn withdrawn thereupon whereupon rapprochement hexagon marathon hereupon mastodon methadon phenomenon pantechnicon Words that almost rhyme with protagon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