REACTIVITY Scrabble 18 Words With Friends 19 Scrabble letter values: R1E1A1C3T1I1V4I1T1Y4 = 18 Definition noun responsive to stimulation. — synonyms: responsiveness noun ready susceptibility to chemical change. Anagrams of REACTIVITY creativity See all 192 words you can make from REACTIVITY → 10-letter words Words starting with R Words ending with Y ← Unscramble different letters