medullary vs medulla

medullary is not a noun while medulla is a noun.

Word	Noun	Adjective	Verb	Adverb
medullary	No	Yes	No	No
medulla	Yes	No	No	No

medullary (noun)	medulla (noun)
	the inner part of an organ or structure in plant or animal
	lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)
	a white fatty substance that forms a medullary sheath around the axis cylinder of some nerve fibers

medullary (adjective)	medulla (adjective)
of or relating to the medulla of any body part
containing or consisting of or resembling bone marrow
of or relating to the medulla oblongata