diurnal parallax vs geocentric parallax

diurnal parallax and geocentric parallax both are nouns.

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

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

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

diurnal parallax (noun)	geocentric 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