helical vs spiralling

helical and spiralling both are adjectives.

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

As adjectives, helical and spiralling are synonyms defined as:

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

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