densitometer vs densimeter

densitometer and densimeter both are nouns.

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

As nouns, densitometer and densimeter are synonyms defined as:

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

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