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