morale builder vs boost

morale builder and boost both are nouns.

Word	Noun	Adjective	Verb	Adverb
morale builder	Yes	No	No	No
boost	Yes	No	Yes	No

As nouns, boost is a hypernym of morale builder; that is, boost is a word with a broader meaning than morale builder:

Other hypernyms of morale builder include encouragement.

morale builder (noun)	boost (noun)
anything that serves to increase morale	the act of giving hope or support to someone
something or someone who influences by building or strengthening morale	the act of giving a push
	an increase in cost

morale builder (verb)	boost (verb)
	increase or raise
	give a boost to; be beneficial to
	push or shove upward, as if from below or behind
	increase
	contribute to the progress or growth of