churning vs roiling

churning and roiling both are adjectives.

Word	Noun	Adjective	Verb	Adverb
churning	No	Yes	No	No
roiling	No	Yes	No	No

As adjectives, churning and roiling are synonyms defined as:

churning and roiling: (of a liquid) agitated vigorously; in a state of turbulence

Other synonyms of churning include roiled, roily, turbulent.

churning (adjective)	roiling (adjective)
(of a liquid) agitated vigorously; in a state of turbulence	(of a liquid) agitated vigorously; in a state of turbulence
moving with or producing or produced by vigorous agitation