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