Asphodeline lutea vs king's spear

Asphodeline lutea and king's spear both are nouns.

Word	Noun	Adjective	Verb	Adverb
Asphodeline lutea	Yes	No	No	No
king's spear	Yes	No	No	No

As nouns, Asphodeline lutea and king's spear are synonyms defined as:

Asphodeline lutea and king's spear: asphodel with leafy stem and fragrant yellow flowers

Other synonyms of Asphodeline lutea include yellow asphodel.

Asphodeline lutea (noun)	king's spear (noun)
asphodel with leafy stem and fragrant yellow flowers	asphodel with leafy stem and fragrant yellow flowers