Here's what rhymes with waterline.
line align aline fine nine sign mine wine assign pine shine shrine thine dine sine vine brine sein tine whine affine malign zine design divine decline define benign spine dopamine iodine resign borderline refine supine swine twine underline proline opine realign stein interline alkaline confine undermine incline atropine palatine pyridine thiamine centerline consign hyperfine thymine enshrine recline asinine reassign superfine timberline cosign crystalline endocrine turpentine cysteine redefine redesign serpentine monoamine saccharine anodyne anticline byzantine calamine columbine crinoline entwine intertwine epinephrine concubine exocrine imipramine porcupine recombine valentine eglantine celandine disincline reconsign lacustrine neuroendocrine noncrystalline clementine norepinephrine tetracycline polycrystalline Words that almost rhyme with waterline
lime rhyme rime time crime prime climb clime dime hym slime beim chime grime heing mime thyme chyme birdlime sublime overtime anteing begrime paradigm dinnertime wintertime suppertime sauteing maritime anytime pantomime lysozyme onetime summertime mistime mesenchyme flexitime environ