fibrous tissue vs plant tissue

fibrous tissue and plant tissue both are nouns.

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

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

fibrous tissue: tissue consisting of or containing fibers in both animals and plants
plant tissue: the tissue of a plant

Other hypernyms of fibrous tissue include animal tissue.

fibrous tissue (noun)	plant tissue (noun)
tissue consisting of or containing fibers in both animals and plants	the tissue of a plant