apothecaries' ounce vs troy ounce

apothecaries' ounce and troy ounce both are nouns.

Word	Noun	Adjective	Verb	Adverb
apothecaries' ounce	Yes	No	No	No
troy ounce	Yes	No	No	No

As nouns, apothecaries' ounce and troy ounce are synonyms defined as:

apothecaries' ounce and troy ounce: a unit of apothecary weight equal to 480 grains or one twelfth of a troy pound

Other synonyms of apothecaries' ounce include ounce.

apothecaries' ounce (noun)	troy ounce (noun)
a unit of apothecary weight equal to 480 grains or one twelfth of a troy pound	a unit of apothecary weight equal to 480 grains or one twelfth of a troy pound