giant cane vs cane reed

giant cane and cane reed both are nouns.

Word	Noun	Adjective	Verb	Adverb
giant cane	Yes	No	No	No
cane reed	Yes	No	No	No

As nouns, giant cane and cane reed are synonyms defined as:

giant cane and cane reed: tall grass of southern United States growing in thickets

Other synonyms of giant cane include Arundinaria gigantea.

giant cane (noun)	cane reed (noun)
tall grass of southern United States growing in thickets	tall grass of southern United States growing in thickets