piriform lobe vs pyriform lobe

piriform lobe and pyriform lobe both are nouns.

Word	Noun	Adjective	Verb	Adverb
piriform lobe	Yes	No	No	No
pyriform lobe	Yes	No	No	No

As nouns, piriform lobe and pyriform lobe are synonyms defined as:

piriform lobe and pyriform lobe: pear-shaped neural structure on either side of the brain in the rhinencephalon

Other synonyms of piriform lobe include piriform area, pyriform area.

piriform lobe (noun)	pyriform lobe (noun)
pear-shaped neural structure on either side of the brain in the rhinencephalon	pear-shaped neural structure on either side of the brain in the rhinencephalon