towing path vs towpath

towing path and towpath both are nouns.

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

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

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

towing path (noun)	towpath (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