Is coat a synonym

Answer 1

Yes, coat is a synonym for many words. In one context, for example, coat is a synonym for fur and other words like that. And you can say fur is a synonym for coat, too.

A group of synonyms are like rocks on a riverbank. No two exactly alike, they are different colors, sizes, shapes, and surface textures, but you can tell that each is a rock. Likewise with a synonymous group of words, no two mean exactly the same but all are close enough in meaning that you can lump them together and often exchange one for another in a sentence to vary the prose, and subtly shade meaning.

Coat in the sense of animal or plant protective covering is a synonym for the following words: hair, fur, pelt, skin, shell, rind, integument, wool, skin, ectoderm, epidermis, fleece, hide, husk, membrane, pellicle, scales

And each of those words is a synonym for coat in this context, too.