towpath vs towing path

towpath and towing path both are nouns.

Word	Noun	Adjective	Verb	Adverb
towpath	Yes	No	No	No
towing path	Yes	No	No	No

As nouns, towpath and towing path are synonyms defined as:

towpath and towing path: a path along a canal or river used by animals towing boats

towpath (noun)	towing path (noun)
a path along a canal or river used by animals towing boats	a path along a canal or river used by animals towing boats