roof vs shingle

roof and shingle both are nouns.

Word	Noun	Adjective	Verb	Adverb
roof	Yes	No	Yes	No
shingle	Yes	No	Yes	No

As verbs, shingle is a hyponym of roof; that is, shingle is a word with a more specific, narrower meaning than roof:

Other hyponyms of roof include thatch, slate.

roof (noun)	shingle (noun)
a protective covering that covers or forms the top of a building	a small signboard outside the office of a lawyer or doctor, e.g.
protective covering on top of a motor vehicle	building material used as siding or roofing
an upper limit on what is allowed	coarse beach gravel of small waterworn stones and pebbles (or a stretch of shore covered with such gravel)
the inner top surface of a covered area or hollow space

roof (verb)	shingle (verb)
provide a building with a roof; cover a building with a roof	cover with shingles