variation vs biological science

variation and biological science both are nouns.

Word	Noun	Adjective	Verb	Adverb
variation	Yes	No	No	No
biological science	Yes	No	No	No

variation (noun)	biological science (noun)
an activity that varies from a norm or standard	the science that studies living organisms
the act of changing or altering something slightly but noticeably from the norm or standard
(ballet) a solo dance or dance figure
an artifact that deviates from a norm or standard
something a little different from others of the same type
a repetition of a musical theme in which it is modified or embellished
an instance of change; the rate or magnitude of change
(biology) an organism that has characteristics resulting from chromosomal alteration
(astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon)
the process of varying or being varied
the angle (at a particular location) between magnetic north and true north