volute vs helical

volute is a noun but helical is not a noun.

Word	Noun	Adjective	Verb	Adverb
volute	Yes	Yes	No	No
helical	No	Yes	No	No

As adjectives, volute and helical are synonyms defined as:

Other synonyms of volute include coiling, spiral, spiraling, spiralling, turbinate, voluted, whorled.

volute (noun)	helical (noun)
a structure consisting of something wound in a continuous series of loops
ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center

volute (adjective)	helical (adjective)
in the shape of a coil	in the shape of a coil