medulla vs medullary

medulla is a noun but medullary is not a noun.

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

medulla (noun)	medullary (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

medulla (adjective)	medullary (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