longicorn beetle vs long-horned beetle

longicorn beetle and long-horned beetle both are nouns.

Word	Noun	Adjective	Verb	Adverb
longicorn beetle	Yes	No	No	No
long-horned beetle	Yes	No	No	No

As nouns, longicorn beetle and long-horned beetle are synonyms defined as:

longicorn beetle and long-horned beetle: long-bodied beetle having very long antennae

Other synonyms of longicorn beetle include longicorn.

longicorn beetle (noun)	long-horned beetle (noun)
long-bodied beetle having very long antennae	long-bodied beetle having very long antennae