firebreak vs fireguard

firebreak and fireguard both are nouns.

Word	Noun	Adjective	Verb	Adverb
firebreak	Yes	No	No	No
fireguard	Yes	No	No	No

As nouns, firebreak and fireguard are synonyms defined as:

firebreak and fireguard: a narrow field that has been cleared to check the spread of a prairie fire or forest fire

firebreak (noun)	fireguard (noun)
a narrow field that has been cleared to check the spread of a prairie fire or forest fire	a metal screen before an open fire for protection (especially against flying sparks)
	a narrow field that has been cleared to check the spread of a prairie fire or forest fire