Synonyms for appreciative

thankful, appreciatory, grateful, obliged, indebted, responsive, keen, alive to, sensitive to, understanding, sympathetic, generous, cooperative, enlightened, aware, perceptive, favorable, satisfied, cordial, considerate, friendly, affectionate, entertained, gladdened, sensible of, cognizant of, conscious of, capable of appreciating, under obligation, beholden, enthusiastic, receptive.

Antonyms unfriendly*, cold, hostile.