relate vs concern

relate is not a noun while concern is a noun.

Word	Noun	Adjective	Verb	Adverb
relate	No	No	Yes	No
concern	Yes	No	Yes	No

As verbs, relate and concern are synonyms defined as:

Other synonyms of relate include bear on, come to, have to do with, pertain, refer, touch, touch on.

relate (noun)	concern (noun)
	something that interests you because it is important or affects you
	something or someone that causes anxiety; a source of unhappiness
	a feeling of sympathy for someone or something
	an anxious feeling
	a commercial or industrial enterprise and the people who constitute it

relate (verb)	concern (verb)
make a logical or causal connection	be relevant to
give an account of; narrate	be on the mind of
have or establish a relationship to
be relevant to
be in a relationship with