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