Yoo rhymes with:
askew, byu, cmu, cue, debut, depew, depue, dfw, ewe, few, fitzhugh, fondue, gue, hew, hewe, hue, hugh, imbue, iou, kew, kyu, lemieux, lhommedieu, liu, mccue, mcgue, mchugh, meiyuh, mew, peugh, pew, phew, pugh, q, q., que, queue, review, revue, schewe, skew, spew, suu, thankyou, true-view, u, u., uwe, view, vue, whay-yu, yew, you, yu, yue
Yoo sounds like:
y, y., ya, yah, yahi, yahoo, yahweh, yahya, yao, yau, yaw, yay, ye, ye-yi, yea, yeah, yee, yeh, yehiya, yeo, yew, yi, yie, yo, yoe, yoh, yohe, yohei, yoho, you, yow, yoy, yoyo, yu, yue