perfective aspect vs aspect

perfective aspect and aspect both are nouns.

Word	Noun	Adjective	Verb	Adverb
perfective aspect	Yes	No	No	No
aspect	Yes	No	No	No

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

perfective aspect: the aspect of a verb that expresses a completed action
aspect: the beginning or duration or completion or repetition of the action of a verb

perfective aspect (noun)	aspect (noun)
the aspect of a verb that expresses a completed action	the feelings expressed on a person's face
	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