stub vs plant structure

stub and plant structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
stub	Yes	No	Yes	No
plant structure	Yes	No	No	No

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

Other hypernyms of stub include plant part.

stub (noun)	plant structure (noun)
the small unused part of something (especially the end of a cigarette that is left after smoking)	any part of a plant or fungus
a torn part of a ticket returned to the holder as a receipt
the part of a check that is retained as a record
a short piece remaining on a trunk or stem where a branch is lost
a small piece

stub (verb)	plant structure (verb)
strike (one's toe) accidentally against an object
clear of weeds by uprooting them
extinguish by crushing
pull up (weeds) by their roots