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