potato bug vs Colorado beetle

potato bug and Colorado beetle both are nouns.

Word	Noun	Adjective	Verb	Adverb
potato bug	Yes	No	No	No
Colorado beetle	Yes	No	No	No

As nouns, potato bug and Colorado beetle are synonyms defined as:

potato bug and Colorado beetle: black-and-yellow beetle that feeds in adult and larval stages on potato leaves; originally of eastern Rocky Mountains; now worldwide

Other synonyms of potato bug include Colorado potato beetle, Leptinotarsa decemlineata, potato beetle.

potato bug (noun)	Colorado beetle (noun)
black-and-yellow beetle that feeds in adult and larval stages on potato leaves; originally of eastern Rocky Mountains; now worldwide	black-and-yellow beetle that feeds in adult and larval stages on potato leaves; originally of eastern Rocky Mountains; now worldwide