yellow jacket vs yellow hornet

yellow jacket and yellow hornet both are nouns.

Word	Noun	Adjective	Verb	Adverb
yellow jacket	Yes	No	No	No
yellow hornet	Yes	No	No	No

As nouns, yellow jacket and yellow hornet are synonyms defined as:

yellow jacket and yellow hornet: small yellow-marked social wasp commonly nesting in the ground

Other synonyms of yellow jacket include Vespula maculifrons.

yellow jacket (noun)	yellow hornet (noun)
small yellow-marked social wasp commonly nesting in the ground	small yellow-marked social wasp commonly nesting in the ground
a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic