densimeter vs densitometer

densimeter and densitometer both are nouns.

Word	Noun	Adjective	Verb	Adverb
densimeter	Yes	No	No	No
densitometer	Yes	No	No	No

As nouns, densimeter and densitometer are synonyms defined as:

densimeter and densitometer: a measuring instrument for determining density or specific gravity

densimeter (noun)	densitometer (noun)
a measuring instrument for determining density or specific gravity	a measuring instrument for determining optical or photographic density
	a measuring instrument for determining density or specific gravity