key palm vs silvertop palmetto

key palm and silvertop palmetto both are nouns.

Word	Noun	Adjective	Verb	Adverb
key palm	Yes	No	No	No
silvertop palmetto	Yes	No	No	No

As nouns, key palm and silvertop palmetto are synonyms defined as:

key palm and silvertop palmetto: small stocky fan palm of southern Florida and Cuba

Other synonyms of key palm include silver thatch, Thrinax keyensis, Thrinax microcarpa, Thrinax morrisii.

key palm (noun)	silvertop palmetto (noun)
small stocky fan palm of southern Florida and Cuba	small stocky fan palm of southern Florida and Cuba