slate fence vs fencing

slate fence and fencing both are nouns.

Word	Noun	Adjective	Verb	Adverb
slate fence	Yes	No	No	No
fencing	Yes	No	No	No

As nouns, fencing is a hypernym of slate fence; that is, fencing is a word with a broader meaning than slate fence:

slate fence: a type of palisade made of vertical slabs of slate wired together.
fencing: a barrier that serves to enclose an area

Other hypernyms of slate fence include fence, palisade.

slate fence (noun)	fencing (noun)
a type of palisade made of vertical slabs of slate wired together.	the art or sport of fighting with swords (especially the use of foils or epees or sabres to score points under a set of rules)
	a barrier that serves to enclose an area
	material for building fences