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