perfective vs perfect tense

perfective and perfect tense both are nouns.

Word	Noun	Adjective	Verb	Adverb
perfective	Yes	No	No	No
perfect tense	Yes	No	No	No

As nouns, perfective and perfect tense are synonyms defined as:

perfective and perfect tense: a tense of verbs used in describing action that has been completed (sometimes regarded as perfective aspect)

Other synonyms of perfective include perfect, perfective tense.

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