Coarse or Course?
Your choice!
Coarse
Exemple : ‘’The fabric feels very coarse!’’
The words "coarse" and "course" are often mixed up because, although they have different meanings, they are homonyms. "Coarse" is an adjective used to denote that something is rough in texture.
Course
Exemple : ‘’I am taking a cookery course during the summer.’’
"Course" is a noun with a number of different uses. For example it can be used to denote a set of classes which together make up a "course." It can also be used in culinary terms to denote the different parts of a meal; starter, main course and dessert.