Here's what rhymes with gratuitous.
Words that almost rhyme with gratuitous
ruinous uveitis luminous duelists spookiness kookiness ludicrous voluminous bituminous luminance albuminous mutinous glutinous humanise ruefulness tunefulness glutenous usefulness truthfulness cumulus ruminants ruthlessness uselessness humanness youthfulness rootlessness pugilists gruesomeness dehumanise lutenists scrupulous humanists lubricants fruitfulness untruthfulness fruitlessness fumigants nutriments illusionists unscrupulous communicants humourlessness