preposition vs prepose

preposition is a noun but prepose is not a noun.

Word	Noun	Adjective	Verb	Adverb
preposition	Yes	No	No	No
prepose	No	No	Yes	No

preposition (noun)	prepose (noun)
a function word that combines with a noun or pronoun or noun phrase to form a prepositional phrase that can have an adverbial or adjectival relation to some other word
(linguistics) the placing of one linguistic element before another (as placing a modifier before the word it modifies in a sentence or placing an affix before the base to which it is attached)

preposition (verb)	prepose (verb)
	place before another constituent in the sentence