The difference between Coarse and Rough

When used as adjectives, coarse means composed of large parts or particles, whereas rough means not smooth.

Rough is also noun with the meaning: the unmowed part of a golf course.

Rough is also adverb with the meaning: in a rough manner.

Rough is also verb with the meaning: to create in an approximate form.

check bellow for the other definitions of Coarse and Rough

Coarse as an adjective:

Composed of large parts or particles; of inferior quality or appearance; not fine in material or close in texture.
Coarse as an adjective:

Lacking refinement, taste or delicacy

Examples:

"coarse manners"

"coarse language"

Rough as an adjective:

Not smooth; uneven.
Rough as an adjective:

Approximate; hasty or careless; not finished.

Examples:

"a rough estimate; a rough sketch of a building; a rough plan"
Rough as an adjective:

Turbulent.

Examples:

"The sea was rough."
Rough as an adjective:

Difficult; trying.

Examples:

"Being a teenager nowadays can be rough."
Rough as an adjective:

Crude; unrefined

Examples:

"His manners are a bit rough, but he means well."
Rough as an adjective:

Violent; not careful or subtle

Examples:

"This box has been through some rough handling."
Rough as an adjective:

Loud and hoarse; offensive to the ear; harsh; grating.

Examples:

"a rough tone; a rough voice"

"rfquotek Alexander Pope"
Rough as an adjective:

Not polished; uncut; said of a gem.

Examples:

"a rough diamond"
Rough as an adjective:

Harsh-tasting.

Examples:

"rough wine"
Rough as an adjective (chiefly, UK, colloquial, slang):

Somewhat ill; sick
Rough as an adjective (chiefly, UK, colloquial, slang):

Unwell due to alcohol; hungover

Rough as a noun:

The unmowed part of a golf course.
Rough as a noun:

A rude fellow; a coarse bully; a rowdy.
Rough as a noun (cricket):

A scuffed and roughened area of the pitch, where the bowler's feet fall, used as a target by spin bowlers because of its unpredictable bounce.
Rough as a noun:

The raw material from which faceted or cabochon gems are created.
Rough as a noun:

A quick sketch, similar to a thumbnail, but larger and more detailed. Meant for artistic brainstorming and a vital step in the design process.
Rough as a noun (obsolete):

Boisterous weather.

Examples:

"rfquotek Fletcher"

Rough as a verb:

To create in an approximate form.

Examples:

"Rough in the shape first, then polish the details."
Rough as a verb (ice hockey):

To commit the offense of roughing, i.e. to punch another player.
Rough as a verb:

To render rough; to roughen.
Rough as a verb:

To break in (a horse, etc.), especially for military purposes.

Examples:

"rfquotek Crabb"
Rough as a verb:

To endure primitive conditions.