Flagler rhymes with:
agler, hagler, kagler, straggler, wagler, agler, angler, buegler, bungler, burglar, crigler, daigler, degler, egler, finagler, gaugler, gengler, hagler, haigler, hegler, huggler, kagler, kaigler, kegler, koogler, legler, nagler, peagler, pregler, riegler, segler, shingler, siegler, smuggler, spiegler, stiegler, stigler, straggler, strangler, vogler, wagler, wangler, zeagler, ziegler, ziglar