shingle vs shingler

shingle and shingler both are nouns.

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

shingle (noun)	shingler (noun)
a small signboard outside the office of a lawyer or doctor, e.g.	a worker who shingles roofs
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)

shingle (verb)	shingler (verb)
cover with shingles