A synonym is a word that mean the same thing as another word.

Both attractive and pretty mean to be good looking; thus, attractive is a synonym for pretty.

An antonym is a word that means the opposite of another word.

The word "small" means to be little. The opposite of little is big; thus, big is the correct answer.

A synonym is a word that mean the same thing as another word.

The word "small" means to be little. Tiny is another word that means to be little; thus, tiny is the correct answer.