Words That Rhyme With "Theory" :
2 syllables:
beary, beery, biery, biri, bleary, cheery, Cleary, dearie, deary, deery, dreary, eary, eerie, eery, Erie, feirie, geary, kiri, leary, leery, Peary, peerie, peery, peri, Pherae, query, seery, siri, smeary, sphery, teary, Thiry, veery, weary, wiry, yeary
3 syllables:
aweary, dehere, Guarnieri, Kashmiri, oleary, unweary, Valkyrie