This document lists common adjective opposites compiled by Prof. Rayan Gomes. It includes 18 pairs of opposite adjectives such as happy/sad, neat/messy, tight/loose, open/closed, empty/full, heavy/light, short/long, narrow/wide, hard/soft, handsome/ugly, poor/rich, strong/weak, slow/fast, dirty/clean, fat/thin, old/young, ill/healthy, and kind/rude. The full list also includes the pairs busy/free, clever/stupid, lazy/hard-working, good/bad, and safe/dangerous.