growth vs peduncle

growth and peduncle both are nouns.

Word	Noun	Adjective	Verb	Adverb
growth	Yes	No	No	No
peduncle	Yes	No	No	No

As nouns, peduncle is a hyponym of growth; that is, peduncle is a word with a more specific, narrower meaning than growth:

Other hyponyms of growth include excrescence, exostosis, polyp, polypus, neoplasm, tumor, tumour, hamartoma.

growth (noun)	peduncle (noun)
the gradual beginning or coming forth	a bundle of myelinated neurons joining different parts of the brain
vegetation that has grown	stalk bearing an inflorescence or solitary flower
something grown or growing	the thin process of tissue that attaches a polyp to the body
(biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level
a progression from simpler to more complex forms
a process of becoming larger or longer or more numerous or more important
(pathology) an abnormal proliferation of tissue (as in a tumor)