attorney-client relation vs lawyer-client relation

attorney-client relation and lawyer-client relation both are nouns.

Word	Noun	Adjective	Verb	Adverb
attorney-client relation	Yes	No	No	No
lawyer-client relation	Yes	No	No	No

As nouns, attorney-client relation and lawyer-client relation are synonyms defined as:

attorney-client relation and lawyer-client relation: the responsibility of a lawyer to act in the best interests of the client

attorney-client relation (noun)	lawyer-client relation (noun)
the responsibility of a lawyer to act in the best interests of the client	the responsibility of a lawyer to act in the best interests of the client