perfective aspect vs perfective

perfective aspect and perfective both are nouns.

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

As nouns, perfective aspect and perfective are synonyms defined as:

perfective aspect and perfective: the aspect of a verb that expresses a completed action

perfective aspect (noun)	perfective (noun)
the aspect of a verb that expresses a completed action	the aspect of a verb that expresses a completed action
	a tense of verbs used in describing action that has been completed (sometimes regarded as perfective aspect)