Difference between Churn and Roil

Churn

Part of speech: verb

Definition: To agitate rapidly and repetitively, or to stir with a rowing or rocking motion; generally applies to liquids, notably cream. To produce excessive and sometimes undesirable or unproductive activity or motion. To move rapidly and repetitively with a rocking motion; to tumble, mix or shake.

Part of speech: noun

Definition: A vessel used for churning. The time when a consumer switches his/her service provider. The mass of people who are ready to switch carriers, expressed by the formula Customer Quits/Customer base.

Roil

Part of speech: verb

Definition: To render turbid by stirring up the dregs or sediment of; as, to roil wine, cider, etc, in casks or bottles; to roil a spring.