the.com/antonyms
Words locked in eternal opposition, like hot and cold sharing a thermostat.
means Words with opposite meanings, such as up and down, love and hate, or open and closed.
from From Greek anti (against) and onyma (name) — literally a counter-name, coined in the 1860s as the natural foil to synonym.
Three flavorsGradable, complementary, and relational opposites all qualify.
Not absoluteHot has many opposites depending on context.
Auto-antonyms existCleave and dust mean both opposite things.