emperor vs emperor moth

emperor and emperor moth both are nouns.

Word	Noun	Adjective	Verb	Adverb
emperor	Yes	No	No	No
emperor moth	Yes	No	No	No

As nouns, emperor and emperor moth are synonyms defined as:

emperor and emperor moth: large moth of temperate forests of Eurasia having heavily scaled transparent wings

Other synonyms of emperor include Saturnia pavonia.

emperor (noun)	emperor moth (noun)
large richly colored butterfly	large moth of temperate forests of Eurasia having heavily scaled transparent wings
large moth of temperate forests of Eurasia having heavily scaled transparent wings
red table grape of California
the male ruler of an empire