aspect vs grammatical relation

aspect and grammatical relation both are nouns.

Word	Noun	Adjective	Verb	Adverb
aspect	Yes	No	No	No
grammatical relation	Yes	No	No	No

As nouns, grammatical relation is a hypernym of aspect; that is, grammatical relation is a word with a broader meaning than aspect:

aspect: the beginning or duration or completion or repetition of the action of a verb
grammatical relation: a linguistic relation established by grammar

aspect (noun)	grammatical relation (noun)
the feelings expressed on a person's face	a linguistic relation established by grammar
a characteristic to be considered
a distinct feature or element in a problem
the visual percept of a region
the beginning or duration or completion or repetition of the action of a verb