What Does “Same Word, Different Forms” Mean? One root word can grow into four comparing forms. “Compare, comparison, comparative, comparable” share one meaning. That meaning is “to look at how things are alike or different.” Each form has a different job in a sentence. One word shows an action. One word names the act of looking. One word describes a grammar form or degree. One word describes things that can be compared. Learning these four forms builds critical thinking.
Personal Pronouns Change Their Form This rule applies to pronouns like “they, them, their.” But word families work the same way for other words. “Compare” is a verb. “Comparison” is a noun. “Comparative” is an adjective. “Comparable” is an adjective. Each form answers a different question. What action? Compare. What thing or act? Comparison. What kind of degree or grammar? Comparative. What kind of similarity? Comparable.
From Verb to Noun to Adjective to Adverb – One Family, Many Words This family starts with the verb “compare.” You compare two toys to see which is bigger. You compare two stories to find similarities. From “compare,” we make the noun “comparison.” “Comparison” names the act of comparing. Example: “A comparison of cats and dogs shows many differences.” From “compare,” we make the adjective “comparative.” “Comparative” describes the form of an adjective that shows more. Example: “Taller is the comparative form of tall.” From “compare,” we make another adjective “comparable.” “Comparable” means similar enough to compare. Example: “These two puzzles are comparable in difficulty.”
One Root, Many Roles – How Words Grow from Actions to Qualities Think of two apples on a table. You “compare” their sizes. That is the verb. The whole activity is a “comparison.” That is the noun. When you say one apple is “redder,” “redder” is the “comparative” form. That is the adjective. If the apples are close in size, they are “comparable.” That is the describing adjective. The root meaning stays “looking together.” The role changes with each sentence.
Same Meaning, Different Jobs – Is It a Verb or a Noun? “Compare” is always a verb. It shows the action of finding similarities and differences. Example: “Compare your answer with the book.” “Comparison” is always a noun. It names the act or result of comparing. Example: “The comparison showed that both stories had happy endings.” “Comparative” is always an adjective. It describes a degree of difference or a grammar form. Example: “Better is the comparative form of good.” “Comparable” is always an adjective. It describes things that can reasonably be compared. Example: “The two houses are comparable in price.” Same family. Different jobs.
Adjectives and Adverbs – When Do We Add -ly? This family does not have a common adverb from “comparative.” You can make “comparatively” by adding -ly. Example: “The second car is comparatively cheaper.” You can make “comparably” from “comparable.” Example: “The two phones performed comparably.” These are bonus forms for later learning. This lesson focuses on “compare, comparison, comparative, comparable.” The -ly rule applies, but keep these four main forms first.
Watch Out for Tricky Spelling Changes (Double Letters, y to i, and More) “Compare” has no double letters. It ends with a silent “e.” When we add “-ison,” we drop the “e” and change something? Compare – drop “e” – add ison = comparison. But note: comparison has “i” after the “p.” Compare → comparison (par becomes par? no change). When we add “-ative,” we drop the “e.” Compare – drop “e” – add ative = comparative. When we add “-able,” we drop the “e.” Compare – drop “e” – add able = comparable. A common mistake is writing “comparison” with an “e” (compareison). The correct spelling is comparison (no “e” after “par”). Another mistake is writing “comparable” with an “e” in the middle (compareable). The correct spelling is comparable (drop the “e”). Write slowly at first. Remember: compare, comparison, comparative, comparable.
Let’s Practice – Can You Choose the Right Form? Try these sentences with your child. Fill in the blank with compare, comparison, comparative, or comparable.
Let’s _______ the length of these two pencils.
A _______ of summer and winter shows big differences.
Faster is the _______ form of fast.
These two brands of cereal are _______ in price.
Can you _______ your drawing with your friend’s?
The teacher asked for a _______ of the two books.
Happier is the _______ form of happy.
The sizes are not _______ because one is much larger.
Answers:
compare
comparison
comparative
comparable
compare
comparison
comparative
comparable
Go through each answer slowly. Ask your child why the word fits. Praise effort and thoughtful comparing. Keep practice short and clear.
Tips for Parents – Help Your Child Learn Word Families in a Fun Way You can teach “compare, comparison, comparative, comparable” through daily life. Use food, toys, and simple choices.
At snack time, put two fruits on a plate. Say “Let’s compare which is bigger.” Ask “What action are we doing?”
After comparing, say “We made a comparison.” Ask “What is a comparison?”
When you talk about sizes, say “Bigger is the comparative form.” Ask “What is the comparative of tall?”
When two toys are similar, say “These are comparable.” Ask “What does comparable mean?”
Play a “spot the difference” game. Write the four words on sticky notes. Say a sentence. Let your child hold up the correct word. Example: “Compare the two cars.” Child holds “compare.” “We made a comparison.” Child holds “comparison.” “Better is comparative.” Child holds “comparative.” “They are comparable.” Child holds “comparable.”
Draw a four-part poster. Write “compare” with a picture of two apples side by side. Write “comparison” with a picture of a Venn diagram. Write “comparative” with a picture of tall, taller, tallest. Write “comparable” with a picture of two similar backpacks. Hang it on the wall.
Use a “which is bigger” game. Hold up two toys. Say “Compare them.” Let your child say one difference. Say “Good comparison.”
Keep each session under five minutes. Repeat games on different days. Children learn through playful noticing of similarities and differences.
When your child makes a mistake, smile. Say “Good try. Let me show you again.” Use the correct word in a simple sentence. Then continue.
No need for grammar drills. No need for tests. Just warm examples and real comparing every day. Soon your child will master “compare, comparison, comparative, comparable.” That skill will help them think clearly, describe differences, and make wise choices.