phasmid vs stick insect

phasmid and stick insect both are nouns.

Word	Noun	Adjective	Verb	Adverb
phasmid	Yes	No	No	No
stick insect	Yes	No	No	No

As nouns, stick insect is a hyponym of phasmid; that is, stick insect is a word with a more specific, narrower meaning than phasmid:

phasmid: large cylindrical or flattened mostly tropical insects with long strong legs that feed on plants; walking sticks and leaf insects
stick insect: any of various mostly tropical insects having long twiglike bodies

Other hyponyms of phasmid include walking stick, walkingstick, leaf insect, walking leaf.

phasmid (noun)	stick insect (noun)
large cylindrical or flattened mostly tropical insects with long strong legs that feed on plants; walking sticks and leaf insects	any of various mostly tropical insects having long twiglike bodies