Closest in meaning:
* Mollis: This means "soft" and could be used to describe something like a fluffy blanket.
* Levis: This means "light" and can be used to describe something like a fluffy cloud.
Figurative options:
* Pulvinus: This literally means "cushion" but can also refer to something soft and comfortable, similar to "fluffy."
* Lanugo: This specifically refers to the soft downy hair of a newborn.
Descriptive phrases:
You could also use a descriptive phrase like "mollis et spumosus," which literally translates to "soft and foamy," to convey the idea of "fluffy."
Ultimately, the best Latin word or phrase to use will depend on the specific context and what you are trying to describe.