canna vs arrowroot

canna and arrowroot both are nouns.

Word	Noun	Adjective	Verb	Adverb
canna	Yes	No	No	No
arrowroot	Yes	No	No	No

As nouns, arrowroot is a hyponym of canna; that is, arrowroot is a word with a more specific, narrower meaning than canna:

canna: any plant of the genus Canna having large sheathing leaves and clusters of large showy flowers
arrowroot: canna grown especially for its edible rootstock from which arrowroot starch is obtained

Other hyponyms of canna include Canna generalis, canna lily, achira, Canna edulis, Canna indica, indian shot.

canna (noun)	arrowroot (noun)
any plant of the genus Canna having large sheathing leaves and clusters of large showy flowers	white-flowered West Indian plant whose root yields arrowroot starch
	canna grown especially for its edible rootstock from which arrowroot starch is obtained
	a nutritive starch obtained from the root of the arrowroot plant