running noose vs clench

running noose and clench both are nouns.

Word	Noun	Adjective	Verb	Adverb
running noose	Yes	No	No	No
clench	Yes	No	Yes	No

As nouns, clench is a hyponym of running noose; that is, clench is a word with a more specific, narrower meaning than running noose:

running noose: a loop formed in a cord or rope by means of a slipknot; it binds tighter as the cord or rope is pulled
clench: a small slip noose made with seizing

Other hyponyms of running noose include clinch.

running noose (noun)	clench (noun)
a loop formed in a cord or rope by means of a slipknot; it binds tighter as the cord or rope is pulled	the act of grasping
	a small slip noose made with seizing

running noose (verb)	clench (verb)
	hold in a tight grasp
	squeeze together tightly