ml vs millilitre

ml and millilitre both are nouns.

Word	Noun	Adjective	Verb	Adverb
ml	Yes	No	No	No
millilitre	Yes	No	No	No

As nouns, ml and millilitre are synonyms defined as:

ml and millilitre: a metric unit of volume equal to one thousandth of a liter

Other synonyms of ml include cc, cubic centimeter, cubic centimetre, mil, milliliter.

ml (noun)	millilitre (noun)
a metric unit of volume equal to one thousandth of a liter	a metric unit of volume equal to one thousandth of a liter