water crowfoot vs aquatic plant

water crowfoot and aquatic plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
water crowfoot	Yes	No	No	No
aquatic plant	Yes	No	No	No

As nouns, aquatic plant is a hypernym of water crowfoot; that is, aquatic plant is a word with a broader meaning than water crowfoot:

water crowfoot: plant of ponds and slow streams having submerged and floating leaves and white flowers; Europe and North America
aquatic plant: a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth

Other hypernyms of water crowfoot include hydrophyte, hydrophytic plant, water plant.

water crowfoot (noun)	aquatic plant (noun)
plant of ponds and slow streams having submerged and floating leaves and white flowers; Europe and North America	a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth