Here's what rhymes with mastard.
fostered Words that almost rhyme with mastard
prospered altered martyred offered awkward honored onward watered armored chartered unaltered authored faltered bartered sauntered tottered augured cantered doctored forward ordered conquered bothered northward orchard quartered slaughtered cornered foreword garnered soldered collared fathered hollered watchword crossword snored sponsored wandered tortured bordered pondered proffered conjured harbored stoppered coauthored laundered unconquered starboard dishonored reconquered disordered henceforward squandered thenceforward straightforward