Here's what rhymes with octree.
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 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 queerly twee whee degree decree qui ac debris xvi xvii esprit fc fhe lessee ski xxi xxii xxiii db kb pc pg rupee sv tp trainee xxvi xxvii xxxi appellee bt donee dp jt pd quis tb tv xxxii xxxiii xxxvi xxxvii goatee scree tepee bursae curie parolee prithee ranee wormy artsy epee gutsy saree teepee topee puttee sirree kedgeree yippee paltrier http cc trustee cd exp foresee marquis addressee jubilee quelque referee sd sibi apogee ftp marquee pensee bowsprit retiree settee banshee potpourri suttee aurorae emcee fusee quinsy draftee honoree jamboree sudsy whoopee florae footsie tootsie sultrier wintrier shoetree guarantee nobody mit disagree devotee mortgagee nominee assignee grantee guaranty oversee appointee legatee repartee vendee amphorae filigree oversea undersea abscissae amputee detainee attendee calliope escapee internee monody returnee wannabe conferee deportee dungaree abductee guarani soignee wannabee bourgeoisie absentee interviewee licensee phonology diastole hyperbole transferee tympani bumblebee honeybee manatee timpani invitee axletree chiropody colossally enlistee inductee singletree whiffletree whippletree maharanee consignee franchisee idiosyncrasy