rootstalk vs rootstock

rootstalk and rootstock both are nouns.

Word	Noun	Adjective	Verb	Adverb
rootstalk	Yes	No	No	No
rootstock	Yes	No	No	No

As nouns, rootstalk and rootstock are synonyms defined as:

rootstalk and rootstock: a horizontal plant stem with shoots above and roots below serving as a reproductive structure

Other synonyms of rootstalk include rhizome.

rootstalk (noun)	rootstock (noun)
a horizontal plant stem with shoots above and roots below serving as a reproductive structure	root or part of a root used for plant propagation; especially that part of a grafted plant that supplies the roots
	a horizontal plant stem with shoots above and roots below serving as a reproductive structure