dumb cane vs Dieffenbachia sequine

dumb cane and Dieffenbachia sequine both are nouns.

Word	Noun	Adjective	Verb	Adverb
dumb cane	Yes	No	No	No
Dieffenbachia sequine	Yes	No	No	No

As nouns, dumb cane and Dieffenbachia sequine are synonyms defined as:

dumb cane and Dieffenbachia sequine: an evergreen plant with large showy dark green leaves; contains a poison that swells the tongue and throat hence the name

Other synonyms of dumb cane include mother-in-law's tongue, mother-in-law plant.

dumb cane (noun)	Dieffenbachia sequine (noun)
an evergreen plant with large showy dark green leaves; contains a poison that swells the tongue and throat hence the name	an evergreen plant with large showy dark green leaves; contains a poison that swells the tongue and throat hence the name