entomology vs caste

entomology and caste both are nouns.

Word	Noun	Adjective	Verb	Adverb
entomology	Yes	No	No	No
caste	Yes	No	No	No

entomology (noun)	caste (noun)
the branch of zoology that studies insects	in some social insects (such as ants) a physically distinct individual or group of individuals specialized to perform certain functions in the colony
	a social class separated from others by distinctions of hereditary rank or profession or wealth
	(Hinduism) a hereditary social class among Hindus; stratified according to ritual purity
	social status or position conferred by a system based on class