water plant vs tracheophyte

water plant and tracheophyte both are nouns.

Word	Noun	Adjective	Verb	Adverb
water plant	Yes	No	No	No
tracheophyte	Yes	No	No	No

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

water 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
tracheophyte: green plant having a vascular system: ferns, gymnosperms, angiosperms

Other hypernyms of water plant include vascular plant.

water plant (noun)	tracheophyte (noun)
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	green plant having a vascular system: ferns, gymnosperms, angiosperms