incomparable vs one

incomparable is not a noun while one is a noun.

Word	Noun	Adjective	Verb	Adverb
incomparable	No	Yes	No	No
one	Yes	Yes	No	No

incomparable (noun)	one (noun)
	a single person or thing
	the smallest whole number or a numeral representing this number

incomparable (adjective)	one (adjective)
such that comparison is impossible; unsuitable for comparison or lacking features that can be compared	used of a single unit or thing; not two or more
	being a single entity made by combining separate components
	(informal) very; used informally as an intensifier
	eminent beyond or above comparison
	indefinite in time or position
	of the same kind or quality
	having the indivisible character of a unit