Deadlier rhymes with:
friendlier, sadlier, bollier, boulier, bouthillier, boutilier, brallier, caillier, callier, charlier, chillier, cochlear, colier, collyer, colyer, costlier, cuvelier, earlier, friendlier, fuselier, gallier, hellyer, hillier, hillyer, hilyer, holier, hollier, jollier, lallier, langelier, letellier, likelier, livelier, mononuclear, montpelier, nuclear, parlier, sadlier, salyer, sillier, soulier, tellier, thermonuclear, tullier, uglier, vallier
Deadlier sounds like:
dahler, dallaire, dallara, deadwyler, dealer, dehler, delair, delara, delaura, delaware, deller, delleri, delora, delore, delorey, deloria, delray, delre, delrio, detailer, detweiler, detwiler, dilaura, dilauro, diller, dilorio, dollar, dowler, duller, dweller