long-horned grasshopper vs tettigoniid

long-horned grasshopper and tettigoniid both are nouns.

Word	Noun	Adjective	Verb	Adverb
long-horned grasshopper	Yes	No	No	No
tettigoniid	Yes	No	No	No

As nouns, long-horned grasshopper and tettigoniid are synonyms defined as:

long-horned grasshopper and tettigoniid: grasshoppers with long threadlike antennae and well-developed stridulating organs on the forewings of the male

long-horned grasshopper (noun)	tettigoniid (noun)
grasshoppers with long threadlike antennae and well-developed stridulating organs on the forewings of the male	grasshoppers with long threadlike antennae and well-developed stridulating organs on the forewings of the male