Suffix - these are word endings that change the meaning of a word such as:

 

s (Plural - means more than one e.g. cats, trees)

es (Plural - also means more than one e.g. bushes, buses)

ed (Past tense e.g. helped, rained)

ing (Present tense e.g. making, spelling)

est (Comparative e.g. biggest, tallest)