imperfect tense vs progressive tense

imperfect tense and progressive tense both are nouns.

Word	Noun	Adjective	Verb	Adverb
imperfect tense	Yes	No	No	No
progressive tense	Yes	No	No	No

As nouns, imperfect tense and progressive tense are synonyms defined as:

imperfect tense and progressive tense: a tense of verbs used in describing action that is on-going

Other synonyms of imperfect tense include continuous tense, imperfect, progressive.

imperfect tense (noun)	progressive tense (noun)
a tense of verbs used in describing action that is on-going	a tense of verbs used in describing action that is on-going