water-shield vs fanwort

water-shield and fanwort both are nouns.

Word	Noun	Adjective	Verb	Adverb
water-shield	Yes	No	No	No
fanwort	Yes	No	No	No

As nouns, water-shield and fanwort are synonyms defined as:

water-shield and fanwort: common aquatic plant of eastern North America having floating and submerged leaves and white yellow-spotted flowers

Other synonyms of water-shield include Cabomba caroliniana.

water-shield (noun)	fanwort (noun)
common aquatic plant of eastern North America having floating and submerged leaves and white yellow-spotted flowers	common aquatic plant of eastern North America having floating and submerged leaves and white yellow-spotted flowers
aquatic plant with floating oval leaves and purple flowers; in lakes and slow-moving streams; suitable for aquariums