further vs boost

further is not a noun while boost is a noun.

Word	Noun	Adjective	Verb	Adverb
further	No	Yes	Yes	Yes
boost	Yes	No	Yes	No

As verbs, further and boost are synonyms defined as:

Other synonyms of further include advance, encourage, promote.

As verbs, boost is a hypernym of further; that is, boost is a word with a broader meaning than further:

Other hypernyms of further include advance, encourage, further, promote.

further (noun)	boost (noun)
	the act of giving hope or support to someone
	the act of giving a push
	an increase in cost

further (adjective)	boost (adjective)
more distant in especially degree

further (verb)	boost (verb)
contribute to the progress or growth of	increase or raise
promote the growth of	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

further (adverb)	boost (adverb)
to or at a greater distance in time or space (`farther' is used more frequently than `further' in this physical sense)
to or at a greater extent or degree or a more advanced stage (`further' is used more often than `farther' in this abstract sense)
in addition or furthermore