reenforce vs bolster

reenforce is not a noun while bolster is a noun.

Word	Noun	Adjective	Verb	Adverb
reenforce	No	No	Yes	No
bolster	Yes	No	Yes	No

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

Other hyponyms of reenforce include buttress, line, bolster up, mine.

reenforce (noun)	bolster (noun)
	a pillow that is often put across a bed underneath the regular pillows

reenforce (verb)	bolster (verb)
make stronger	add padding to
	support and strengthen
	prop up with a pillow or bolster