moa vs anomalopteryx

moa and anomalopteryx both are nouns.

Word	Noun	Adjective	Verb	Adverb
moa	Yes	No	No	No
anomalopteryx	Yes	No	No	No

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

moa: extinct flightless bird of New Zealand
anomalopteryx: the smallest moa; slender moa about the size of a large turkey

Other hyponyms of moa include Dinornis giganteus, giant moa, Anomalopteryx oweni.

moa (noun)	anomalopteryx (noun)
extinct flightless bird of New Zealand	the smallest moa; slender moa about the size of a large turkey