stifle vs stimulate

stifle is a noun but stimulate is not a noun.

Word	Noun	Adjective	Verb	Adverb
stifle	Yes	No	Yes	No
stimulate	No	No	Yes	No

stifle (noun)	stimulate (noun)
joint between the femur and tibia in a quadruped; corresponds to the human knee

stifle (verb)	stimulate (verb)
suppress or constrain so as to lessen in intensity	cause to be alert and energetic
be asphyxiated; die from lack of oxygen	act as a stimulant
suppress in order to conceal or hide	provide the needed stimulus for
impair the respiration of or obstruct the air passage of	cause to do; cause to act in a specified manner
	cause to occur rapidly
	stir the feelings, emotions, or peace of
	stir feelings in