potato moth vs potato tuber moth

potato moth and potato tuber moth both are nouns.

Word	Noun	Adjective	Verb	Adverb
potato moth	Yes	No	No	No
potato tuber moth	Yes	No	No	No

As nouns, potato moth and potato tuber moth are synonyms defined as:

potato moth and potato tuber moth: greyish-brown moth whose larva is the potato tuberworm

Other synonyms of potato moth include Phthorimaea operculella, splitworm.

potato moth (noun)	potato tuber moth (noun)
greyish-brown moth whose larva is the potato tuberworm	greyish-brown moth whose larva is the potato tuberworm