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