trade surplus vs excess

trade surplus and excess both are nouns.

Word	Noun	Adjective	Verb	Adverb
trade surplus	Yes	No	No	No
excess	Yes	Yes	No	No

As nouns, excess is a hypernym of trade surplus; that is, excess is a word with a broader meaning than trade surplus:

Other hypernyms of trade surplus include nimiety, surplus, surplusage.

trade surplus (noun)	excess (noun)
an excess of exports over imports.	excessive indulgence
	immoderation as a consequence of going beyond sufficient or permitted limits
	a quantity much larger than is needed
	the state of being more than full

trade surplus (adjective)	excess (adjective)
	more than is needed, desired, or required