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