Nouns

(n)fata soft greasy substance occurring in organic tissue and consisting of a mixture of lipids (mostly triglycerides)“pizza has too much fat”
(n)adipose tissue, fat, fatty tissuea kind of body tissue containing stored fat that serves as a source of energy; it also cushions and insulates vital organs“fatty tissue protected them from the severe cold”
(n)fatness, fat, blubber, avoirdupoisexcess bodily weight“she disliked fatness in herself as well as in others”

Verbs

(v)fatten, fat, flesh out, fill out, plump, plump out, fatten out, fatten upmake fat or plump“We will plump out that poor starving child”

Adjectives

(a)fathaving an (over)abundance of flesh“he hadn't remembered how fat she was”
(s)fathaving a relatively large diameter“a fat rope”
(a)fatty, fatcontaining or composed of fat“fatty food”, “fat tissue”
(s)fat, juicylucrative“a juicy contract”, “a nice fat job”
(s)fat, fertile, productive, richmarked by great fruitfulness“fertile farmland”, “a fat land”, “a productive vineyard”, “rich soil”