excuse vs bespeak

excuse is a noun but bespeak is not a noun.

Word	Noun	Adjective	Verb	Adverb
excuse	Yes	No	Yes	No
bespeak	No	No	Yes	No

As verbs, bespeak is a hypernym of excuse; that is, bespeak is a word with a broader meaning than excuse:

Other hypernyms of excuse include ask for, call for, quest, request.

excuse (noun)	bespeak (noun)
a poor example
a defense of some offensive behavior or some failure to keep a promise etc.
a note explaining an absence

excuse (verb)	bespeak (verb)
accept an excuse for	express the need or desire for
defend, explain, clear away, or make excuses for by reasoning	be a signal for or a symptom of
excuse, overlook, or make allowances for; be lenient with
serve as a reason or cause or justification of
grant exemption or release to
ask for permission to be released from an engagement