old man's beard vs Tillandsia

old man's beard and Tillandsia both are nouns.

Word	Noun	Adjective	Verb	Adverb
old man's beard	Yes	No	No	No
Tillandsia	Yes	No	No	No

old man's beard (noun)	Tillandsia (noun)
dense festoons of greenish-grey hairlike flexuous strands anchored to tree trunks and branches by sparse wiry roots; southeastern United States and West Indies to South America	large genus of epiphytic or terrestrial sparse-rooting tropical plants usually forming dense clumps or pendant masses
common climber of eastern North America that sprawls over other plants and bears numerous panicles of small creamy white flowers
vigorous deciduous climber of Europe to Afghanistan and Lebanon having panicles of fragrant green-white flowers in summer and autumn