As nouns the difference between wet and wetu
is that wet
is liquid or moisture while wetu
is (us) a dwelling, a domed hut similar to a wigwam, used by some native americans in the northeastern united states, especially the wampanoag.
As an adjective wet
is of an object, etc, covered with or impregnated with liquid.
As a verb wet
is to cover or impregnate with liquid.