accept vs undertake

accept and undertake both are verbs.

Word	Noun	Adjective	Verb	Adverb
accept	No	No	Yes	No
undertake	No	No	Yes	No

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

accept (verb)	undertake (verb)
consider or hold as true	promise to do or accomplish
react favorably to; consider right and proper	enter into a contractual arrangement
tolerate or accommodate oneself to	enter upon an activity or enterprise
be sexually responsive to, used of a female domesticated mammal	accept as a charge
give an affirmative reply to; respond favorably to	accept as a challenge
receive willingly something given or offered
take on as one's own the expenses or debts of another person
admit into a group or community
receive (a report) officially, as from a committee
make use of or accept for some purpose
be designed to hold or take