reinforce vs bolster up

reinforce and bolster up both are verbs.

Word	Noun	Adjective	Verb	Adverb
reinforce	No	No	Yes	No
bolster up	No	No	Yes	No

As verbs, bolster up is a hyponym of reinforce; that is, bolster up is a word with a more specific, narrower meaning than reinforce:

Other hyponyms of reinforce include buttress, line, bolster, mine.

reinforce (verb)	bolster up (verb)
make stronger	support and strengthen
strengthen and support with rewards