Simple antonyms     entrance/exit

1. a) The girl couldn’t find the entrance.
2. b) The girl couldn’t find the exit.

These are simple antonyms because they are contradictory, they cannot both be true and they cannot both be false. Exit and Entrance are simple antonyms. Although exit means the place or means of going out entrance would just be the antonym for an exit.  

Gradable antonyms        friendly / unfriendly

(a) The man in the store was friendly towards my family and me.

(b) The man in the store was unfriendly towards my family and me.

(c) The man in the store was neither friendly nor unfriendly towards my family and me.

What this means is that both (a) and (b) can’t both be true, but they can both be false, so they are contrary. So friendly and unfriendly are gradable antonyms

 

Reverses           borrow/lend

If someone borrows something from you they are technically also lending you that item or product. They both go hand and hand with one another. 

Converses           doctor / patient

(a) Dr. Kathy is Selena’s doctor. 

(b) Selena is Dr. Kathy’s student.

Once you switch up the names “doctor” and “teacher” you could still get a sentence that is being used in a propositional way and meaning.  

Taxonomic sisters       Yorkie / Maltipoo

A Yorkie is a kind of dog, and so is a Maltipoo. They are both in the same category as being dogs.