planimeter vs integrator

planimeter and integrator both are nouns.

Word	Noun	Adjective	Verb	Adverb
planimeter	Yes	No	No	No
integrator	Yes	No	No	No

As nouns, planimeter and integrator are synonyms defined as:

planimeter and integrator: a measuring instrument for measuring the area of an irregular plane figure

planimeter (noun)	integrator (noun)
a measuring instrument for measuring the area of an irregular plane figure	a measuring instrument for measuring the area of an irregular plane figure