fencing vs building material

fencing and building material both are nouns.

Word	Noun	Adjective	Verb	Adverb
fencing	Yes	No	No	No
building material	Yes	No	No	No

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

fencing (noun)	building material (noun)
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)	material used for constructing buildings
a barrier that serves to enclose an area
material for building fences