aquatic plant vs tracheophyte

aquatic plant and tracheophyte both are nouns.

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

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

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

Other hypernyms of aquatic plant include vascular plant.

aquatic 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