There is a difference between ending verbs with “-or” and “-er” to create an agent noun. But do you know what that difference is?
Luckily, this article will explain why there are two different suffixes for the same purpose.
Suffixes -or vs. -er
You should end a word with “-or” if it is of Latin origin. It is rare, though there are examples such as “meditate” and “meditator.” You should almost always end a verb with “-er” to turn it into an agent noun to follow English rules. For example, “drive” into “driver.”
Here are two examples showing you how the “-or” ending might appear:
- Have you spoken to the actor lately? They might be able to help you.
- You should let your tutor know that you can’t make it to your lesson this week.
And here are two examples showing you more about the “-er” suffix:
- What are you going to do about the cooker, though? It hasn’t worked for ages!
- I’m a reader, and I’ve never found a book that I didn’t love.
Are you looking for a tip to help? Remember this simple tip when you’re next stuck:
If you can change a word to have “-ion” at the end of it, then it needs the “-or” ending.
- Correct: Actor / Action
- Correct: Meditator / Meditation
- Incorrect: Driver / Drivion
- Incorrect: Timer / Timion
Otherwise, you must always use the “-er” ending.
In the rest of the article, you can learn more about when to use each suffix. We’ll also show you some common words ending in “-er” and “or.”
When to Use -er
You’ll find that “-er” is the most common suffix for agent nouns in English. After all, you will almost always add “-er” at the end of a verb to create a noun.
Check out some examples to show you when it appears:
- I’m not a runner, but I can move fast! Why don’t you watch what I can do?
- I’ll still be the keeper for this case. Let me know if I need to do anything else, though.
There isn’t much more to say about “-er” suffix nouns. Most of it comes down to learning which words end with an “-er” and practicing them until you nail them.
If in doubt, you should generally use the “-er” ending. It’s much more likely to be correct than the “-or” ending.
So, here is a selection of ten common words you might find with the “-er” suffix:
- Reader
- Cooker
- Driver
- Computer
- Runner
- Toaster
- Swimmer
- Looker
- Keeper
- Trumpeter
When to Use -or
You might not come across “-or” all that often. It appears at the end of Latin words.
Some Latin words are still present in modern-day English, and you need to learn them to understand when “-or” makes sense.
Here are some examples to help you:
- I’m the negotiator, and I’m here to figure out what we need to do next.
- So, why is the janitor not cleaning the floors as we speak?
Generally, one of the easiest ways to know whether you’re dealing with a Latin word is to add an “-ion” to the end of the root word.
For example, you could turn “negotiate” into “negotiation.” Therefore, “negotiate” would also have an “-or” ending.
The ten most common uses of “-or” at the end of a noun are:
- Actor
- Bailor
- Janitor
- Tutor
- Meditator
- Author
- Donor
- Realtor
- Sculptor
- Negotiator
Martin holds a Master’s degree in Finance and International Business. He has six years of experience in professional communication with clients, executives, and colleagues. Furthermore, he has teaching experience from Aarhus University. Martin has been featured as an expert in communication and teaching on Forbes and Shopify. Read more about Martin here.