king's spear vs Asphodeline lutea

king's spear and Asphodeline lutea both are nouns.

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

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

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

Other synonyms of king's spear include yellow asphodel.

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