Here's what rhymes with wallaroo.
to who you do two new too due knew du u coup qu shoe zu anew dew lieu shew su sue tu vous chew deux fu lu rue zoo adieu ado bu hu ju jus ku loo mu nu peu pu seu shu sou vu woo yew yu boo chou chu coo cou doo ewe feu gu ru shou thu tue vou wou wu goo moo pooh poo shoo gnu roux thew whew through few true view blue drew grew que crew pursue threw blew flew q avenue canoe clue cue glue hue queue undue accrue cu flue slew stew taboo undo brew flu overdue pew tattoo thru fue hew mieux shrew tzu vue clew mew overdo halloo valuer kazoo slue overshoe phew wazoo achoo into overview screw bamboo renew ensue subdue untrue jusqu overthrew piu skew beaucoup eschew kangaroo outdo shampoo sprue vnto askew redo strew cockatoo spew bugaboo foreknew zebu buckaroo overflew overdrew overgrew booboo regrew atishoo review revenue hitherto residue withdrew debut retinue revue sinew imbue outgrew ballyhoo honeydew endue fondue indue marabou peekaboo muumuu interview rendezvous caribou construe hullabaloo bestrew prevue superglue barbecue barbeque misconstrue