What 4 letter word has the same vowel sound as mule?

This would include the rhyming (yool) Words duel and fuel. Also rule and other long OO Words such as cool, fool, pool, and tool.

Other 4-letter Words with the long OO sound are

O - tomb, womb

O - (silent E) move

OO - noon, boot

OE - shoe

U - tune, ruby

UE - blue, true

UI - suit

EW - flew, crew, view