Coarse vs. Course: How to Choose the Right Word

These homophones sound the same, but have greatly different meanings

Putting Green at Sunset
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The words "coarse" and "course" are homophones: They sound alike but have different meanings. Originally, "coarse" and "course" were the same word, but in the 18th century, the differences in spelling and meaning emerged, and the words have long since gone their separate ways, explains Bryan Garner in "Garner's Modern American Usage."

How to Use "Coarse"

The adjective "coarse" means rough, common, inferior, crude, or vulgar. It can also refer to something that is composed of large parts or particles. Synonyms for "coarse" would be harsh, raucous, or rough in tone.

When it means vulgar, "coarse" can refer to a film that is lowbrow. Sandpaper is often described as "coarse" when it has a high degree of grit, as opposed to fine sandpaper, which does not.

How to Use "Course"

As a noun, "course" can mean several things, including path, playing field, mode of behavior, unit of study, and onward movement. When used as such, "course" can refer to a route, duration, academic class, golf playing field, or parts of a meal. For example, a busy student might be taking many "courses," or hungry diners might go through several "courses" during the "course" of the meal.

As a verb, "course" means to move swiftly. You might say that blood "courses" through your veins, for instance. The word also has several idiomatic uses, often meaning obviously, as in "of course."


"Coarse" is largely used in a couple of ways: to describe the texture of something or to describe something as vulgar. For example, "My sister dislikes the 'coarse' language used by many of today's comedians," means that my sister dislikes vulgar or crude language, or profanity, used by many current comedians.

When referring to texture, "coarse" doesn't only refer to the roughness of sandpaper. For example, you might say:

  • The fabric had a very "coarse" texture.

In this use, "coarse" describes the texture of the fabric, which was likely made of slubbed or rough material. The word can also describe materials as being rough-hewn, as in:

  • The builder decided to use broken stones and other "coarse" materials for the foundation of the house.

"Course," by contrast, often refers to the links of a golf course. You might say that professional golfer Tiger Woods has played on many golf "courses" throughout the world in the "course" of his career. You would thus be saying the Woods has played on many links during the years of his career.

Or you could comment that a certain professor has taught many "courses"—or classes—over the "course" of his career. In addition to meaning a road or way, "course" can mean a path, as in, "The navigator of the ship set a direct 'course' for home." The word can also have a more esoteric meaning, describing a person's path in his life or even his academic career, as in, "After failing the entrance exam, Bob had to come up with a new 'course' of action."

When describing the different parts of a meal, you could say, "The diners enjoyed the main 'course' but not the other eight 'courses,' including dessert." This means the diners liked the main dish, perhaps a burger or steak, but did not enjoy the other parts of the meal.

How to Remember the Difference

It can be a challenge to remember the difference between "coarse" vs. "course," but offers a couple of tips: The word "course" contains the smaller word "our." Many of the meanings of "course," such as an academic class, a golf playing field, or parts of a meal, are things we do together. The word "our"—contained in the word "course"—implies something we do, celebrate, or hold together.

To remember when to use "coarse," use a British term: "Coarse" contains the word "arse," meaning buttocks, which in some circles is impolite to mention. "In other words, to talk about an arse is coarse," says

Additionally, "course" is always a noun or verb, while "coarse" is always an adjective. The words "coarse" and "adjective" both contain an "a." So if you have a flair for grammar, this might be a good way to remember how to use "coarse" (an adjective) instead of "course" (a noun or verb).

Idiom Alerts

The word "course" has a number of idiomatic uses in English. It's helpful for an English-language student to learn them.

On course: The expression "on course" means going in the right direction, moving forward as expected, or following a plan correctly:

  • If the student keeps going as she has been, she is "on course" to graduate two years early.

Take (or run) its course: The expression "take (or run) its course" means to let something progress or continue without interference:

  • Rather than try to break up the couple, the mother decided just to let the relationship "run its course."

Of course: Probably the most widely used idiomatic expression using the term, "of course" means naturally, for sure, or without a doubt. The expression often conveys a bit of an attitude on the part of the speaker, as in:

  • "Of course" I'm going on vacation with my family. Did you think I would stay home alone?

A matter of course: This expression, which is so familiar that Merriam-Webster's dictionary punctuates it as a "matter-of-course," means something that is expected or occurring or proceeding in a logical or natural manner. Using this idiom, you could say:

  • She accepted his advances as a "matter-of-course."
  • His "matter-of-course" manner caused her anger to flare.

"Course" as a Compound Word

There are instances when "course" is combined with another term to form a compound word. Two of the most common are "racecourse" and "watercourse." These terms are similar to "golf course," but unlike the term describing the tract of land for playing golf, these two terms incorporate "course" to form new words.

"Racecourse" is a synonym for racetrack, a facility used for the racing of vehicles, athletes, or animals, as in:

  • Although the "racecourse" was muddy after the rain the previous night, the horses negotiated it with ease.

"Watercourse" refers to a brook, stream, or artificially constructed water channel, as in:

  • The banks of the "watercourse" were steep and treacherous, but the seasoned explorers managed to pass over them with little difficulty.


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Nordquist, Richard. "Coarse vs. Course: How to Choose the Right Word." ThoughtCo, Aug. 28, 2020, Nordquist, Richard. (2020, August 28). Coarse vs. Course: How to Choose the Right Word. Retrieved from Nordquist, Richard. "Coarse vs. Course: How to Choose the Right Word." ThoughtCo. (accessed May 30, 2023).