encouragement vs spur

encouragement and spur both are nouns.

Word	Noun	Adjective	Verb	Adverb
encouragement	Yes	No	No	No
spur	Yes	No	Yes	No

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

encouragement (noun)	spur (noun)
the act of giving hope or support to someone	a sharp prod fixed to a rider's heel and used to urge a horse onward
the expression of approval and support	a railway line connected to a trunk line
the feeling of being encouraged	a verbalization that encourages you to attempt something
	tubular extension at the base of the corolla in some flowers
	any sharply pointed projection