oneness vs one

oneness and one both are nouns.

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

oneness (noun)	one (noun)
the quality of being united into one	a single person or thing
	the smallest whole number or a numeral representing this number

oneness (adjective)	one (adjective)
	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