fissiparous vs biological science

fissiparous is not a noun while biological science is a noun.

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

fissiparous (noun)	biological science (noun)
	the science that studies living organisms

fissiparous (adjective)	biological science (adjective)
reproducing by fission
having separated or advocating separation from another entity or policy or attitude