Suffix Words

A suffix is a meaningful word part added after a base word or root. This list lets third graders compare several jobs that common suffixes do in words they can use in their own writing.

The paired forms bigger/biggest, faster/fastest, and easier/easiest show how -er and -est compare. Slowly, nearly, and really use -ly to form words that often tell how or to what degree. The -ful/-less groups create useful meaning contrasts such as careful/careless, while happiness, kindness, movement, and enjoyment show -ness and -ment forming nouns.

Unlike the Prefix Words lesson, these meaningful parts come after the base. Some examples attach directly, while others preserve a spelling change already made at the join: big becomes bigger, and easy becomes easier. The purpose here is to recognize and spell the suffixes and understand their jobs. The following Suffix Spelling Changes unit teaches how to decide among the changes themselves.

How to practice this list

First sort the words by suffix. For a comparison word, say the base and compare the two forms aloud and in writing: fast, faster, fastest. For the other groups, cover the suffix, identify the remaining base or useful word part, then restore the ending and explain what the finished word means. Mix the groups in short dictated sentences so meaning—not the order of the list—signals the needed suffix.

A learner may leave out a suffix letter, confuse -ful with -less, or preserve a base incorrectly at the join. Ask which meaning or job the ending must carry, compare the word with its base, and correct only the uncertain join or suffix. If the intended suffix is correct but another part of the word is not, acknowledge the successful suffix choice before reviewing that separate spelling.

Move on when your child can identify the base and suffix in these words, spell the endings during mixed practice, and pause to inspect the join instead of assuming that every suffix attaches in the same way.