promotion vs encouragement

promotion and encouragement both are nouns.

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

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

promotion: encouragement of the progress or growth or acceptance of something
encouragement: the expression of approval and support

promotion (noun)	encouragement (noun)
act of raising in rank or position	the act of giving hope or support to someone
the advancement of some enterprise	the expression of approval and support
a message issued in behalf of some product or cause or idea or person or institution	the feeling of being encouraged
encouragement of the progress or growth or acceptance of something