OO.
Coo, woo, shoe, two, too, who, do, ado, undo, through, you, true, blue, flew, stew, etc. See O, UE, EW, etc.
OOCH, see OACH.
OOD.
(As in "brood"), rhymes mood, food, rood, feud, illude, etc., the preterites and participles of verbs in OO, and EW, UE, etc. (As in "wood"), rhymes good, hood, stood, withstood, understood, could, would, brotherhood, livelihood, likelihood, neighbourhood, widowhood. (As in "blood"), rhymes flood, cud, mud, etc.
OOF.
Hoof, proof, roof, woof, aloof, disproof, reproof, behoof.
OOH.
Pooh,§ rhymes EW, etc.
OOK.