oodles |ˈuːdlz| — a large number or amount

oology |oʊˈɑːlədʒiː| — the branch of zoology that studies eggs (especially birds' eggs and their size, shape, coloration, and number)

oolong |ˈuːlɒŋ| — Chinese tea leaves that have been partially fermented before being dried

oomph |ʊmf| — attractiveness to the opposite sex

ooze |uːz| — any thick, viscous matter

oozing |ˈuːzɪŋ| — the process of seeping

oozy |ˈuːzi| — leaking out slowly