merry bells vs wild oats

merry bells and wild oats both are nouns.

Word	Noun	Adjective	Verb	Adverb
merry bells	Yes	No	No	No
wild oats	Yes	No	No	No

As nouns, merry bells and wild oats are synonyms defined as:

merry bells and wild oats: any of various plants of the genus Uvularia having yellowish drooping bell-shaped flowers

Other synonyms of merry bells include bellwort.

merry bells (noun)	wild oats (noun)
any of various plants of the genus Uvularia having yellowish drooping bell-shaped flowers	any of various plants of the genus Uvularia having yellowish drooping bell-shaped flowers