Well nourished is a nice term, it has positive connotations. Your other examples are either inaccurate - big, what's big? My feet are big - or medical terms - obese. These adjectives don't say much about the true nature of my body.

Aural and rhetoric qualities are not inherent, they are culturally and temporally dependent at best. Similarly, the southern European value of fat as a class indicator is still current in some communities, to say nothing of non-Western communities.

My point is that the meaning we attach to the word fat are created, relative to our moral peculiarities. If we separate the imposed values from the word, fat women can begin to find our own space and meaning.