vocabulary
All the words you know and use.
category
A group of things that belong together, like animals or foods.
synonym
A word that means the same or almost the same as another word: big and large.
antonym
A word that means the opposite: hot and cold.
multiple-meaning word
A word that is spelled and said the same way but has different meanings, like bat.
prefix
A word part added to the start of a word that changes its meaning, like un- in unhappy.
suffix
A word part added to the end of a word, like -ing in jumping.