walkingstick vs phasmid insect

walkingstick and phasmid insect both are nouns.

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

As nouns, phasmid insect is a hypernym of walkingstick; that is, phasmid insect is a word with a broader meaning than walkingstick:

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

Other hypernyms of walkingstick include phasmid.

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