Here's what rhymes with summertree.
tree pre ye li plea tlie lee ri ry lea yi lii pari prix rhe brie be he we me she t de see three d free p pp b c sea v ve key agree di g tea thee fee knee ne si z bee mi te vii dc debris flee je ni sie ti wee xi xii xiii ci glee hee hie ki nee pea tc tee wi wie bc dd dy flea gi gli hae ji mea mee ny quay shi shih thi whieh ze alii bailee bb chih dee fea fie gee ghee lhe nae nie pee qi rny sae sci shee spree tiie tke xy zi twee whee degree decree qui ac esprit fc fhe lessee marquis ski xxi xxii xxiii db kb pc pg rupee sv tp trainee xxxi appellee bt donee dp jt marquee pd quis tb tv xxxii xxxiii queerly scree tepee bursae parolee prithee ranee wormy aurorae epee saree teepee honoree topee puttee sirree yippee sultrier shoetree http nobody cc trustee xvi xvii cd foresee nominee addressee jubilee referee sd sibi xxvi xxvii apogee appointee ftp hyperbole pensee xxxvi xxxvii amphorae bowsprit filigree goatee retiree settee undersea abscissae amputee banshee curie honeybee manatee potpourri suttee artsy attendee emcee fusee gutsy wannabe axletree draftee jamboree sudsy whoopee florae footsie kedgeree singletree tootsie paltrier wannabee wintrier mit disagree devotee exp absentee assignee grantee interviewee oversee phonology quelque legatee repartee vendee franchisee oversea bumblebee detainee internee invitee monody quinsy returnee conferee deportee dungaree abductee soignee whiffletree whippletree maharanee guarantee bourgeoisie mortgagee guaranty licensee consignee diastole transferee tympani timpani calliope escapee chiropody colossally enlistee inductee guarani idiosyncrasy