rusk vs Brussels biscuit

rusk and Brussels biscuit both are nouns.

Word	Noun	Adjective	Verb	Adverb
rusk	Yes	No	No	No
Brussels biscuit	Yes	No	No	No

As nouns, rusk and Brussels biscuit are synonyms defined as:

rusk and Brussels biscuit: slice of sweet raised bread baked again until it is brown and hard and crisp

Other synonyms of rusk include twice-baked bread, zwieback.

rusk (noun)	Brussels biscuit (noun)
slice of sweet raised bread baked again until it is brown and hard and crisp	slice of sweet raised bread baked again until it is brown and hard and crisp