Nouns

(n)progressive, progressive tense, imperfect, imperfect tense, continuous tensea tense of verbs used in describing action that is on-going
(n)liberal, liberalist, progressivea person who favors a political philosophy of progress and reform and the protection of civil liberties

Adjectives

(a)progressivefavoring or promoting progress“progressive schools”
(s)progressive, reformist, reform-mindedfavoring or promoting reform (often by government action)
(a)progressive(of taxes) adjusted so that the rate increases as the amount of income increases
(s)progressivegradually advancing in extent
(s)progressive(of a card game or a dance) involving a series of sections for which the participants successively change place or relative position“progressive euchre”, “progressive tournaments”
(s)progressiveadvancing in severity“progressive paralysis”