bowline knot vs bowline

bowline knot and bowline both are nouns.

Word	Noun	Adjective	Verb	Adverb
bowline knot	Yes	No	No	No
bowline	Yes	No	No	No

As nouns, bowline knot and bowline are synonyms defined as:

bowline knot (noun)	bowline (noun)
a loop knot that neither slips nor jams	a loop knot that neither slips nor jams