inclinometer vs dip circle

inclinometer and dip circle both are nouns.

Word	Noun	Adjective	Verb	Adverb
inclinometer	Yes	No	No	No
dip circle	Yes	No	No	No

As nouns, inclinometer and dip circle are synonyms defined as:

inclinometer and dip circle: a measuring instrument for measuring the angle of magnetic dip (as from an airplane)

inclinometer (noun)	dip circle (noun)
a measuring instrument for measuring the angle of magnetic dip (as from an airplane)	a measuring instrument for measuring the angle of magnetic dip (as from an airplane)
an instrument showing the angle that an aircraft makes with the horizon
an instrument used by surveyors in order to measure an angle of inclination or elevation