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