degressive vs progressive

degressive is not a noun while progressive is a noun.

Word	Noun	Adjective	Verb	Adverb
degressive	No	Yes	No	No
progressive	Yes	Yes	No	No

degressive (noun)	progressive (noun)
	a person who favors a political philosophy of progress and reform and the protection of civil liberties
	a tense of verbs used in describing action that is on-going

degressive (adjective)	progressive (adjective)
going down by steps	favoring or promoting progress
(of taxes) gradually decreasing in rate on sums below a certain amount	(of taxes) adjusted so that the rate increases as the amount of income increases
	advancing in severity
	gradually advancing in extent
	favoring or promoting reform (often by government action)
	(of a card game or a dance) involving a series of sections for which the participants successively change place or relative position