cowling vs cowl

cowling and cowl both are nouns.

Word	Noun	Adjective	Verb	Adverb
cowling	Yes	No	No	No
cowl	Yes	No	Yes	No

As nouns, cowling and cowl are synonyms defined as:

cowling and cowl: protective covering consisting of a metal part that covers the engine

Other synonyms of cowling include bonnet, hood.

cowling (noun)	cowl (noun)
protective covering consisting of a metal part that covers the engine	protective covering consisting of a metal part that covers the engine
	a loose hood or hooded robe (as worn by a monk)

cowling (verb)	cowl (verb)
	cover with or as with a cowl