seed plant vs vascular plant

seed plant and vascular plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
seed plant	Yes	No	No	No
vascular plant	Yes	No	No	No

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

seed plant: plant that reproduces by means of seeds not spores
vascular plant: green plant having a vascular system: ferns, gymnosperms, angiosperms

Other hypernyms of seed plant include tracheophyte.

seed plant (noun)	vascular plant (noun)
plant that reproduces by means of seeds not spores	green plant having a vascular system: ferns, gymnosperms, angiosperms