tumblebug vs dung beetle

tumblebug and dung beetle both are nouns.

Word	Noun	Adjective	Verb	Adverb
tumblebug	Yes	No	No	No
dung beetle	Yes	No	No	No

As nouns, dung beetle is a hypernym of tumblebug; that is, dung beetle is a word with a broader meaning than tumblebug:

tumblebug: any of various dung beetles
dung beetle: any of numerous beetles that roll balls of dung on which they feed and in which they lay eggs

tumblebug (noun)	dung beetle (noun)
any of various dung beetles	any of numerous beetles that roll balls of dung on which they feed and in which they lay eggs