cuckoo flower vs lady's smock

cuckoo flower and lady's smock both are nouns.

Word	Noun	Adjective	Verb	Adverb
cuckoo flower	Yes	No	No	No
lady's smock	Yes	No	No	No

As nouns, cuckoo flower and lady's smock are synonyms defined as:

Other synonyms of cuckoo flower include Cardamine pratensis, cuckooflower, meadow cress.

cuckoo flower (noun)	lady's smock (noun)
common perennial native to Europe and western Asia having usually pink flowers with ragged petals	a bitter cress of Europe and America
a bitter cress of Europe and America