heraldry vs fleur-de-lis

heraldry and fleur-de-lis both are nouns.

Word	Noun	Adjective	Verb	Adverb
heraldry	Yes	No	No	No
fleur-de-lis	Yes	No	No	No

heraldry (noun)	fleur-de-lis (noun)
emblem indicating the right of a person to bear arms	(heraldry) charge consisting of a conventionalized representation of an iris
the study and classification of armorial bearings and the tracing of genealogies	plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals