water cabbage vs pistia

water cabbage and pistia both are nouns.

Word	Noun	Adjective	Verb	Adverb
water cabbage	Yes	No	No	No
pistia	Yes	No	No	No

As nouns, water cabbage and pistia are synonyms defined as:

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

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

water cabbage (noun)	pistia (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