Soft
Downy
Soft and fluffy, like down feathers
Fleecy
Soft and fluffy, like fleece
Fluffy
Soft and light, like a cloud or a cotton ball
Silky
A type of fabric that is soft and smooth
Softie
A term for something cuddly or gentle
Squishy
Soft or squishable
Velvet
A type of fabric with a soft and luxurious texture
Wooly
Soft and fluffy, resembling wool