fosterage vs encouragement

fosterage and encouragement both are nouns.

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

As nouns, encouragement is a hypernym of fosterage; that is, encouragement is a word with a broader meaning than fosterage:

fosterage (noun)	encouragement (noun)
helping someone grow up to be an accepted member of the community	the act of giving hope or support to someone
encouragement; aiding the development of something	the expression of approval and support
	the feeling of being encouraged