brown-tail moth vs browntail

brown-tail moth and browntail both are nouns.

Word	Noun	Adjective	Verb	Adverb
brown-tail moth	Yes	No	No	No
browntail	Yes	No	No	No

As nouns, brown-tail moth and browntail are synonyms defined as:

brown-tail moth and browntail: small brown and white European moth introduced into eastern United States; pest of various shade and fruit trees

Other synonyms of brown-tail moth include Euproctis phaeorrhoea.

brown-tail moth (noun)	browntail (noun)
small brown and white European moth introduced into eastern United States; pest of various shade and fruit trees	small brown and white European moth introduced into eastern United States; pest of various shade and fruit trees