wild oats vs merry bells

wild oats and merry bells both are nouns.

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

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

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

Other synonyms of wild oats include bellwort.

wild oats (noun)	merry bells (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