oz. vs ounce

oz. and ounce both are nouns.

Word	Noun	Adjective	Verb	Adverb
oz.	Yes	No	No	No
ounce	Yes	No	No	No

As nouns, oz. and ounce are synonyms defined as:

oz. and ounce: a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams

oz. (noun)	ounce (noun)
a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams	large feline of upland central Asia having long thick whitish fur
	a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams
	a unit of apothecary weight equal to 480 grains or one twelfth of a troy pound