cortex vs plant tissue

cortex and plant tissue both are nouns.

Word	Noun	Adjective	Verb	Adverb
cortex	Yes	No	No	No
plant tissue	Yes	No	No	No

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

cortex: the tissue forming the outer layer of an organ or structure in plant or animal
plant tissue: the tissue of a plant

Other hypernyms of cortex include animal tissue.

cortex (noun)	plant tissue (noun)
the tissue forming the outer layer of an organ or structure in plant or animal	the tissue of a plant
the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum
the tissue that surrounds the lens nucleus