Synonyms for Wash up:

n.

bathe, delouse, bath, ablutions, bubble bath, douche, body odor, clean up, BO. burst, come in, dash, channel, break, deepen, course, crest, cast up, catch. mop, swill, hose down, flush out, scrub, Disinfect, rinse, swab, wash off. toilet (noun)
ablutions.
wash up (noun)
beat, exhaust, tucker, do the dishes, tucker out, lave.

v.

body (verb)
lave.
consume (verb)
exhaust.
lave (verb)
bathe.
wash (verb)
lave, scrub, swab, rinse, bath, do the dishes, clean up.

Other synonyms:

Other relevant words:
bathe, rinse, bath, swill, douche, scrub, clean up, mop, swab.