caste vs entomology

caste and entomology both are nouns.

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

caste (noun)	entomology (noun)
in some social insects (such as ants) a physically distinct individual or group of individuals specialized to perform certain functions in the colony	the branch of zoology that studies insects
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