linguistics vs preposition

linguistics and preposition both are nouns.

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

linguistics (noun)	preposition (noun)
the scientific study of language	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
the humanistic study of language and literature	(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)