Coma (noun) - A prolonged state of deep unconsciousness, caused especially by severe injury or illness.
Synonyms: Unconsciousness, Insensibility, Stupor, Oblivion.
Example: As she heard the death news of his father, she went into a coma.
Comma (noun) - A punctuation mark (,) indicating a pause between parts of a sentence or separating items in a list.
Synonyms: Punctuation Mark, Interval.
Example: It was a heavy water production program, which was one of the few aspects of Soviet nuclear weapons that suffered from interagency rivalry.