hypotenuse vs flank

hypotenuse and flank both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypotenuse	Yes	No	No	No
flank	Yes	No	Yes	No

As nouns, flank is a hypernym of hypotenuse; that is, flank is a word with a broader meaning than hypotenuse:

hypotenuse (noun)	flank (noun)
the side of a right triangle opposite the right angle	the side between ribs and hipbone
	a cut from the fleshy part of an animal's side between the ribs and the leg
	the side of military or naval formation
	a subfigure consisting of a side of something

hypotenuse (verb)	flank (verb)
	be located at the sides of something or somebody