geocentric parallax vs diurnal parallax

geocentric parallax and diurnal parallax both are nouns.

Word	Noun	Adjective	Verb	Adverb
geocentric parallax	Yes	No	No	No
diurnal parallax	Yes	No	No	No

As nouns, geocentric parallax and diurnal parallax are synonyms defined as:

geocentric parallax and diurnal parallax: the parallax of a celestial body using two points on the surface of the earth as the earth rotates

geocentric parallax (noun)	diurnal parallax (noun)
the parallax of a celestial body using two points on the surface of the earth as the earth rotates	the parallax of a celestial body using two points on the surface of the earth as the earth rotates