retrograde vs regressive

retrograde and regressive both are adjectives.

Word	Noun	Adjective	Verb	Adverb
retrograde	No	Yes	Yes	No
regressive	No	Yes	No	No

retrograde (adjective)	regressive (adjective)
of amnesia; affecting time immediately preceding trauma	opposing progress; returning to a former less advanced state
moving from east to west on the celestial sphere; or--for planets--around the sun in a direction opposite to that of the Earth	(of taxes) adjusted so that the rate decreases as the amount of income increases
going from better to worse
moving or directed or tending in a backward direction or contrary to a previous direction

retrograde (verb)	regressive (verb)
get worse or fall back to a previous condition
go back over
move back
move in a direction contrary to the usual one
move backward in an orbit, of celestial bodies