In English every word has different form or part of speech. See below__
Suffix/Prefix
Suffixes and prefixes are sets of letters that are added to the beginning or end of another word. They are not words in their own right and cannot stand on their own in a sentence.
Note: The addition of a suffix often changes a word from one word class to another. In the table above, the verb like becomes the adjective likeable, the noun idol becomes the verb idolize, and the noun child becomes the adjective childish.
Note: To do better in suffix/prefix, follow the rules of right form of verb.