wash up vs refreshen

wash up and refreshen both are verbs.

Word	Noun	Adjective	Verb	Adverb
wash up	No	No	Yes	No
refreshen	No	No	Yes	No

As verbs, refreshen is a hypernym of wash up; that is, refreshen is a word with a broader meaning than wash up:

Other hypernyms of wash up include freshen, freshen up, refresh.

wash up (verb)	refreshen (verb)
wash one's face and hands	become or make oneself fresh again
wear out completely	make fresh again
be carried somewhere by water or as if by water
wash dishes
carry somewhere (of water or current or waves)