pipefitting vs pipe fitting

pipefitting and pipe fitting both are nouns.

Word	Noun	Adjective	Verb	Adverb
pipefitting	Yes	No	No	No
pipe fitting	Yes	No	No	No

As nouns, pipefitting and pipe fitting are synonyms defined as:

pipefitting and pipe fitting: fitting consisting of threaded pieces of pipe for joining pipes together

pipefitting (noun)	pipe fitting (noun)
fitting consisting of threaded pieces of pipe for joining pipes together	fitting consisting of threaded pieces of pipe for joining pipes together