rotation vs pivot

rotation and pivot both are nouns.

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

As nouns, pivot is a hyponym of rotation; that is, pivot is a word with a more specific, narrower meaning than rotation:

rotation (noun)	pivot (noun)
the act of rotating as if on an axis	the act of turning on (or as if on) a pivot
a planned recurrent sequence (of crops or personnel etc.)	axis consisting of a short shaft that supports something that turns
a single complete turn (axial or orbital)	the person in a rank around whom the others wheel and maneuver
(mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin

rotation (verb)	pivot (verb)
	turn on a pivot