Cnidoscolus urens vs pica-pica

Cnidoscolus urens and pica-pica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cnidoscolus urens	Yes	No	No	No
pica-pica	Yes	No	No	No

As nouns, Cnidoscolus urens and pica-pica are synonyms defined as:

Other synonyms of Cnidoscolus urens include devil nettle, Jatropha stimulosus, Jatropha urens, spurge nettle, tread-softly.

Cnidoscolus urens (noun)	pica-pica (noun)
a stinging herb of tropical America	a stinging herb of tropical America