meloid vs oil beetle

meloid and oil beetle both are nouns.

Word	Noun	Adjective	Verb	Adverb
meloid	Yes	No	No	No
oil beetle	Yes	No	No	No

As nouns, oil beetle is a hyponym of meloid; that is, oil beetle is a word with a more specific, narrower meaning than meloid:

meloid: beetle that produces a secretion that blisters the skin
oil beetle: any of various beetles that exude an oily substance from the leg joints that deters enemies

Other hyponyms of meloid include Spanish fly.

meloid (noun)	oil beetle (noun)
beetle that produces a secretion that blisters the skin	any of various beetles that exude an oily substance from the leg joints that deters enemies