phasmid vs walking leaf

phasmid and walking leaf both are nouns.

Word	Noun	Adjective	Verb	Adverb
phasmid	Yes	No	No	No
walking leaf	Yes	No	No	No

As nouns, walking leaf is a hyponym of phasmid; that is, walking leaf 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
walking leaf: tropical insect having a flattened leaflike body; common in southern Asia and the East Indies

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

phasmid (noun)	walking leaf (noun)
large cylindrical or flattened mostly tropical insects with long strong legs that feed on plants; walking sticks and leaf insects	tropical insect having a flattened leaflike body; common in southern Asia and the East Indies
	ferns having lanceolate fronds that root at the tip