trade gap vs trade balance

trade gap and trade balance both are nouns.

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

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

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

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

trade gap (noun)	trade balance (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