water orchid vs Eichhornia spesiosa

water orchid and Eichhornia spesiosa both are nouns.

Word	Noun	Adjective	Verb	Adverb
water orchid	Yes	No	No	No
Eichhornia spesiosa	Yes	No	No	No

As nouns, water orchid and Eichhornia spesiosa are synonyms defined as:

water orchid and Eichhornia spesiosa: a tropical floating aquatic plant having spikes of large blue flowers; troublesome in clogging waterways especially in southern United States

Other synonyms of water orchid include Eichhornia crassipes, water hyacinth.

water orchid (noun)	Eichhornia spesiosa (noun)
a tropical floating aquatic plant having spikes of large blue flowers; troublesome in clogging waterways especially in southern United States	a tropical floating aquatic plant having spikes of large blue flowers; troublesome in clogging waterways especially in southern United States