n. 25B6; verb
village girls churned the milk : STIR, agitate, beat, whip, whisk.
the sea churned : HEAVE, boil, swirl, toss, seethe; poetic/literary roil.
the propellers churned up the water : DISTURB, stir up, agitate; poetic/literary roil.
25A0; churn something out PRODUCE, make, turn out; informal crank out, bang out.