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