helix vs buntline coil

helix and buntline coil both are nouns.

Word	Noun	Adjective	Verb	Adverb
helix	Yes	No	No	No
buntline coil	Yes	No	No	No

As nouns, buntline coil is a hyponym of helix; that is, buntline coil is a word with a more specific, narrower meaning than helix:

helix: a structure consisting of something wound in a continuous series of loops
buntline coil: A basic coil for storing rope.

Other hyponyms of helix include hank, gasket coil.

helix (noun)	buntline coil (noun)
a structure consisting of something wound in a continuous series of loops	A basic coil for storing rope.
a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle