superposition vs superpose

superposition is a noun but superpose is not a noun.

Word	Noun	Adjective	Verb	Adverb
superposition	Yes	No	No	No
superpose	No	No	Yes	No

superposition (noun)	superpose (noun)
the placement of one thing on top of another
(geometry) the placement of one object ideally in the position of another one in order to show that the two coincide
(geology) the principle that in a series of stratified sedimentary rocks the lowest stratum is the oldest
(geology) the deposition of one geological stratum on another

superposition (verb)	superpose (verb)
	place (one geometric figure) upon another so that their perimeters coincide
	place on top of