fail vs bumble

fail and bumble both are verbs.

Word	Noun	Adjective	Verb	Adverb
fail	No	No	Yes	No
bumble	No	No	Yes	No

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

fail (verb)	bumble (verb)
stop operating or functioning	speak haltingly
deteriorate	walk unsteadily, tripping repeatedly
prove insufficient	make a mess of, destroy or ruin
disappoint, prove undependable to; abandon, forsake
become bankrupt or insolvent; fail financially and close
be unsuccessful
fail to get a passing grade
fail to do something; leave something undone
judge unacceptable
be unable
fall short in what is expected