millilitre vs milliliter

millilitre and milliliter both are nouns.

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

As nouns, millilitre and milliliter are synonyms defined as:

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

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

millilitre (noun)	milliliter (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