visible balance vs trade gap

visible balance and trade gap both are nouns.

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

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

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

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

visible balance (noun)	trade gap (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