endeavor

nouns

a purposeful or industrious undertaking (especially one that requires effort or boldness)
"he had doubts about the whole enterprise"
endeavor, endeavour, enterprise
earnest and conscientious activity intended to do or accomplish something
"made an effort to cover all the reading material"; "wished him luck in his endeavor"; "she gave it a good try"
attempt, effort, endeavor, endeavour, try

verbs

attempt by employing effort
"we endeavor to make our customers happy"
endeavor, endeavour, strive