feathertop vs Pennistum villosum

feathertop and Pennistum villosum both are nouns.

Word	Noun	Adjective	Verb	Adverb
feathertop	Yes	No	No	No
Pennistum villosum	Yes	No	No	No

As nouns, feathertop and Pennistum villosum are synonyms defined as:

feathertop and Pennistum villosum: northeastern tropical African plant having feathery panicles

Other synonyms of feathertop include feathertop grass.

feathertop (noun)	Pennistum villosum (noun)
northeastern tropical African plant having feathery panicles	northeastern tropical African plant having feathery panicles
a variety of reed grass