ooh
Concise Oxford English Dictionary © 2008 Oxford University Press:
ooh/uː/
▶exclamation used to express a range of emotions including surprise, delight, or pain. ▶verb (oohs, oohing, oohed) (usu. in phr. ooh and aah) utter such an exclamation.
'ooh' also found in these Oxford entries:

