Here's what rhymes with girthing.
                        
                        
                    
                                birthing  unearthing  Words that almost rhyme with girthing
cursing  curving  nursing  serving  surfing  coercing  immersing  swerving  unnerving  observing  deserving  conversing  reserving  reversing  conserving  rehearsing  preserving  traversing  dispersing  unswerving  disbursing  undeserving  earning  urging  curling  curbing  working  learning  burning  turning  occurring  searching  wording  yearning  hurting  lurking  merging  whirling  churning  herding  hurling  jerking  purging  surging  chirping  skirting  verging  lurching  perching  purring  emerging  stirring  asserting  bursting  recurring  sterling  affirming  exerting  blurring  incurring  swirling  alerting  averting  flirting  hurtling  squirming  thirsting  twirling  concerning  referring  returning  confirming  converting  inserting  conferring  converging  discerning  diverting  concurring  diverging  researching  reworking  deferring  deterring  inferring  inverting  manuring  reverting  usurping  disturbing  preferring  overturning  reaffirming  subverting  transferring  disconcerting