lobar vs lobe

lobar is not a noun while lobe is a noun.

Word	Noun	Adjective	Verb	Adverb
lobar	No	Yes	No	No
lobe	Yes	No	No	No

lobar (noun)	lobe (noun)
	a rounded projection that is part of a larger structure
	(anatomy) a somewhat rounded subdivision of a bodily organ or part
	the enhanced response of an antenna in a given direction as indicated by a loop in its radiation pattern
	(botany) a part into which a leaf is divided

lobar (adjective)	lobe (adjective)
of or relating to or affecting a lobe