combat vs armed combat

combat and armed combat both are nouns.

Word	Noun	Adjective	Verb	Adverb
combat	Yes	No	Yes	No
armed combat	Yes	No	No	No

As nouns, combat and armed combat are synonyms defined as:

combat and armed combat: an engagement fought between two military forces

combat (noun)	armed combat (noun)
an engagement fought between two military forces	an engagement fought between two military forces
the act of fighting; any contest or struggle

combat (verb)	armed combat (verb)
battle or contend against in or as if in a battle