Pistia stratiotes vs water lettuce

Pistia stratiotes and water lettuce both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pistia stratiotes	Yes	No	No	No
water lettuce	Yes	No	No	No

As nouns, Pistia stratiotes and water lettuce are synonyms defined as:

Pistia stratiotes and water lettuce: pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes

Other synonyms of Pistia stratiotes include pistia, Pistia stratoites, water cabbage.

Pistia stratiotes (noun)	water lettuce (noun)
pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes	pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes