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