Mammoth Uncensored Word List:
36 words ending with oo, 6 letters long

ahchoo bamboo booboo boocoo boohoo bookoo burgoo cashoo coocoo cuckoo doodoo forhoo gentoo gooroo halloo holloo hoodoo hoopoo hooroo hulloo karroo koodoo mooloo nandoo nardoo samfoo shivoo shypoo sissoo skidoo tattoo tuktoo vaudoo voodoo wandoo zoozoo