catchfly vs lychnis

catchfly and lychnis both are nouns.

Word	Noun	Adjective	Verb	Adverb
catchfly	Yes	No	No	No
lychnis	Yes	No	No	No

As nouns, catchfly and lychnis are synonyms defined as:

catchfly and lychnis: mostly perennial herbs with sticky stems that catch insects; widespread in north temperate zone

catchfly (noun)	lychnis (noun)
mostly perennial herbs with sticky stems that catch insects; widespread in north temperate zone	mostly perennial herbs with sticky stems that catch insects; widespread in north temperate zone
any plant of the genus Silene