Question

vortex has the same or almost the same meaning as: clout fissure idiom swirl

Explanation:

A "vortex" is a mass of fluid that spins and creates a whirlpool - like effect. A "swirl" also describes a twisting, spiraling motion of a substance. "Clout" refers to influence or power, "fissure" is a crack, and "idiom" is a group of words with a figurative meaning. So "swirl" is the closest in meaning.

Answer:

D. swirl