maternal vs parental

maternal and parental both are adjectives.

Word	Noun	Adjective	Verb	Adverb
maternal	No	Yes	No	No
parental	No	Yes	No	No

As adjectives, maternal and parental are synonyms defined as:

maternal and parental: relating to or characteristic of or befitting a parent

Other synonyms of maternal include paternal.

maternal (adjective)	parental (adjective)
characteristic of a mother	relating to or characteristic of or befitting a parent
relating to or characteristic of or befitting a parent	designating the generation of organisms from which hybrid offspring are produced
relating to or derived from one's mother
related on the mother's side