The term 'antonym of AGGRAVATE' can be solved by two crossword solutions: 'RELIEVE' (7 letters) and 'EASE' (4 letters). An antonym is a word that has the opposite meaning of another word. In this case, the antonym of 'AGGRAVATE' is a word that has the opposite meaning of 'AGGRAVATE', which is to make something worse. The two crossword solutions for this antonym are 'RELIEVE' and 'EASE'. 'RELIEVE' means to reduce or remove pain, stress, or suffering, while 'EASE' means to make something less difficult or less severe. Therefore, both words have the opposite meaning of 'AGGRAVATE' and can be used as antonyms.