Coma is a noun which means “unconscious or deep sleep.”

Sentences:

- The boy was hit so hard on the head that he went into coma.

- She died because she had slipped into coma.

Comma is a noun which is a “punctuation mark (,) used to indicate pause or to wait in the sentence.

Sentences:

- Dave did the cleaning, while Sam did cooking.

- The shopkeeper had so many varieties of fruits like apples, mango, banana, grapes.