pistil vs pistillode

pistil and pistillode both are nouns.

Word	Noun	Adjective	Verb	Adverb
pistil	Yes	No	No	No
pistillode	Yes	No	No	No

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

pistil: the female ovule-bearing part of a flower composed of ovary and style and stigma
pistillode: a sterile vestigial pistil remaining in a staminate flower

Other hyponyms of pistil include simple pistil, compound pistil, carpel.

pistil (noun)	pistillode (noun)
the female ovule-bearing part of a flower composed of ovary and style and stigma	a sterile vestigial pistil remaining in a staminate flower