nitrogen vs nitrify

nitrogen is a noun but nitrify is not a noun.

Word	Noun	Adjective	Verb	Adverb
nitrogen	Yes	No	No	No
nitrify	No	No	Yes	No

nitrogen (noun)	nitrify (noun)
a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues

nitrogen (verb)	nitrify (verb)
	treat (soil) with nitrates
	treat with nitrogen or a nitrogen compound
	convert into nitric acid, nitrous acid, or nitrate, especially with the action of nitrobacteria