trade gap vs balance of trade

trade gap and balance of trade both are nouns.

Word	Noun	Adjective	Verb	Adverb
trade gap	Yes	No	No	No
balance of trade	Yes	No	No	No

As nouns, trade gap and balance of trade are synonyms defined as:

trade gap and balance of trade: the difference in value over a period of time of a country's imports and exports of merchandise

Other synonyms of trade gap include trade balance, visible balance.

trade gap (noun)	balance of trade (noun)
the difference in value over a period of time of a country's imports and exports of merchandise	the difference in value over a period of time of a country's imports and exports of merchandise