gravity meter vs gravimeter

gravity meter and gravimeter both are nouns.

Word	Noun	Adjective	Verb	Adverb
gravity meter	Yes	No	No	No
gravimeter	Yes	No	No	No

As nouns, gravity meter and gravimeter are synonyms defined as:

gravity meter and gravimeter: a measuring instrument for measuring variations in the gravitational field of the earth

gravity meter (noun)	gravimeter (noun)
a measuring instrument for measuring variations in the gravitational field of the earth	a measuring instrument for determining the specific gravity of a liquid or solid
	a measuring instrument for measuring variations in the gravitational field of the earth