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