key palm vs silver thatch

key palm and silver thatch both are nouns.

Word	Noun	Adjective	Verb	Adverb
key palm	Yes	No	No	No
silver thatch	Yes	No	No	No

As nouns, key palm and silver thatch are synonyms defined as:

key palm and silver thatch: small stocky fan palm of southern Florida and Cuba

Other synonyms of key palm include silvertop palmetto, Thrinax keyensis, Thrinax microcarpa, Thrinax morrisii.

key palm (noun)	silver thatch (noun)
small stocky fan palm of southern Florida and Cuba	small palm of southern Florida and West Indies closely resembling the silvertop palmetto
	small stocky fan palm of southern Florida and Cuba