supination vs rotation

supination and rotation both are nouns.

Word	Noun	Adjective	Verb	Adverb
supination	Yes	No	No	No
rotation	Yes	No	No	No

As nouns, rotation is a hypernym of supination; that is, rotation is a word with a broader meaning than supination:

supination: rotation of the hands and forearms so that the palms face upward
rotation: the act of rotating as if on an axis

Other hypernyms of supination include rotary motion.

supination (noun)	rotation (noun)
rotation of the hands and forearms so that the palms face upward	the act of rotating as if on an axis
	a planned recurrent sequence (of crops or personnel etc.)
	a single complete turn (axial or orbital)
	(mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin