wash away vs remove

wash away is not a noun while remove is a noun.

Word	Noun	Adjective	Verb	Adverb
wash away	No	No	Yes	No
remove	Yes	No	Yes	No

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

wash away: remove by the application of water or other liquid and soap or some other cleaning agent
remove: remove something concrete, as by lifting, pushing, or taking off, or remove something abstract

Other hypernyms of wash away include take, take away, withdraw.

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

Other hypernyms of wash away include take away.

wash away (noun)	remove (noun)
	degree of figurative distance or separation

wash away (verb)	remove (verb)
remove by the application of water or other liquid and soap or some other cleaning agent	remove something concrete, as by lifting, pushing, or taking off, or remove something abstract
to set aside as irrelevant	stay away or leave
	get rid of something abstract
	shift the position or location of, as for business, legal, educational, or military purposes
	dispose of
	remove from a position or an office
	kill intentionally and with premeditation
	cause to leave