shingler vs shingle

shingler and shingle both are nouns.

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

shingler (noun)	shingle (noun)
a worker who shingles roofs	a small signboard outside the office of a lawyer or doctor, e.g.
	building material used as siding or roofing
	coarse beach gravel of small waterworn stones and pebbles (or a stretch of shore covered with such gravel)

shingler (verb)	shingle (verb)
	cover with shingles