zoology vs invertebrate

zoology and invertebrate both are nouns.

Word	Noun	Adjective	Verb	Adverb
zoology	Yes	No	No	No
invertebrate	Yes	Yes	No	No

zoology (noun)	invertebrate (noun)
the branch of biology that studies animals	any animal lacking a backbone or notochord; the term is not used as a scientific classification
all the animal life in a particular region or period

zoology (adjective)	invertebrate (adjective)
	lacking a backbone or spinal column