tent-fly vs rainfly

tent-fly and rainfly both are nouns.

Word	Noun	Adjective	Verb	Adverb
tent-fly	Yes	No	No	No
rainfly	Yes	No	No	No

As nouns, tent-fly and rainfly are synonyms defined as:

tent-fly and rainfly: flap consisting of a piece of canvas that can be drawn back to provide entrance to a tent

Other synonyms of tent-fly include fly, fly sheet, tent flap.

tent-fly (noun)	rainfly (noun)
flap consisting of a piece of canvas that can be drawn back to provide entrance to a tent	flap consisting of a piece of canvas that can be drawn back to provide entrance to a tent