pluperfect vs perfective

pluperfect and perfective both are nouns.

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

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

pluperfect: a perfective tense used to express action completed in the past
perfective: a tense of verbs used in describing action that has been completed (sometimes regarded as perfective aspect)

Other hypernyms of pluperfect include perfect, perfect tense, perfective tense.

pluperfect (noun)	perfective (noun)
a perfective tense used to express action completed in the past	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)

pluperfect (adjective)	perfective (adjective)
more than perfect