Simple antonyms: married and single

1. Bob is married
2. Bob is single

Simple antonyms are contradictory. If one is true the other cannot also be true. There is no middle ground between the words married and single

Gradable antonyms: interesting and boring

1. This movie is interesting
2. this movie is boring

Gradable antonyms are intermediate terms. The movie could’ve been interesting, boring, or in neither and it could’ve been just ok to watch.

Reverses: open and close

1. She will open the box
2. She will close the box

These are reverse terms because they are denoting motion and are opposite in directions of each other.

Converses: older and younger

1. Kim is older than me
2. I am younger than Kim

These are a converse pair because there is an asymettric relation between older and younger.

Taxonomic Sisters: Sprite and Ginger ale

1. I like sprite
2. I like Ginger ale

Sprite and ginger ale are taxonomic because they have a hyponymous relationship and are both classified as sodas.