Synonyms of reactive

Adjective

1. reactive (vs. unreactive), activated, excited, labile, oxidizable, thermolabile, unstable

usage: participating readily in reactions; "sodium is a reactive metal"; "free radicals are very reactive"

2. reactive, responsive, sensitive (vs. insensitive)

usage: reacting to a stimulus; "the skin of old persons is less reactive than that of younger persons"

Definition and meaning of reactive (Dictionary)