rumble vs combat

rumble and combat both are nouns.

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

As nouns, combat is a hypernym of rumble; that is, combat is a word with a broader meaning than rumble:

Other hypernyms of rumble include fight, fighting, scrap.

rumble (noun)	combat (noun)
a fight between rival gangs of adolescents	an engagement fought between two military forces
a servant's seat (or luggage compartment) in the rear of a carriage	the act of fighting; any contest or struggle
a loud low dull continuous noise

rumble (verb)	combat (verb)
to utter or emit low dull rumbling sounds	battle or contend against in or as if in a battle
make a low noise