flab vs adipose tissue

flab and adipose tissue both are nouns.

Word	Noun	Adjective	Verb	Adverb
flab	Yes	No	No	No
adipose tissue	Yes	No	No	No

As nouns, adipose tissue is a hypernym of flab; that is, adipose tissue is a word with a broader meaning than flab:

flab: loose or flaccid body fat
adipose tissue: a kind of body tissue containing stored fat that serves as a source of energy; it also cushions and insulates vital organs

Other hypernyms of flab include fat, fatty tissue.

flab (noun)	adipose tissue (noun)
loose or flaccid body fat	a kind of body tissue containing stored fat that serves as a source of energy; it also cushions and insulates vital organs