tend vs tendency

tend is not a noun while tendency is a noun.

Word	Noun	Adjective	Verb	Adverb
tend	No	No	Yes	No
tendency	Yes	No	No	No

tend (noun)	tendency (noun)
	a characteristic likelihood of or natural disposition toward a certain condition or character or effect
	an attitude of mind especially one that favors one alternative over others
	an inclination to do something
	a general direction in which something tends to move

tend (verb)	tendency (verb)
have care of or look after
manage or run
have a tendency or disposition to do or be something; be inclined