barrage fire vs shelling

barrage fire and shelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
barrage fire	Yes	No	No	No
shelling	Yes	No	No	No

As nouns, barrage fire and shelling are synonyms defined as:

barrage fire and shelling: the heavy fire of artillery to saturate an area rather than hit a specific target

Other synonyms of barrage fire include barrage, battery, bombardment.

barrage fire (noun)	shelling (noun)
the heavy fire of artillery to saturate an area rather than hit a specific target	the heavy fire of artillery to saturate an area rather than hit a specific target