reed vs toitoi

reed and toitoi both are nouns.

Word	Noun	Adjective	Verb	Adverb
reed	Yes	No	No	No
toitoi	Yes	No	No	No

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

reed: tall woody perennial grasses with hollow slender stems especially of the genera Arundo and Phragmites
toitoi: used by Maoris for thatching

reed (noun)	toitoi (noun)
a musical instrument that sounds by means of a vibrating reed	used by Maoris for thatching
a vibrator consisting of a thin strip of stiff material that vibrates to produce a tone when air streams over it
tall woody perennial grasses with hollow slender stems especially of the genera Arundo and Phragmites