tendency vs desire

tendency and desire both are nouns.

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

As nouns, desire is a hyponym of tendency; that is, desire is a word with a more specific, narrower meaning than tendency:

tendency: a characteristic likelihood of or natural disposition toward a certain condition or character or effect
desire: an inclination to want things

Other hyponyms of tendency include heterosis, hybrid vigor, buoyancy, electronegativity, negativity, stainability.

tendency (noun)	desire (noun)
a characteristic likelihood of or natural disposition toward a certain condition or character or effect	an inclination to want things
an attitude of mind especially one that favors one alternative over others	the feeling that accompanies an unsatisfied state
an inclination to do something	something that is desired
a general direction in which something tends to move

tendency (verb)	desire (verb)
	feel or have a desire for; want strongly
	express a desire for
	expect and wish