a vice president (of a country)

a president (the head of state of a republic)

executive order

the act of standing in for someone

to act for another, to execute for another, to execute business for another

absence

time / an event, case, occasion, moment; a specific period in time / a time of something / a season / a tense / (literary) the time during which a narrative takes place

duties at work, function at one's job, line of duty

copy / Short for 副詞 (fukushi, “adverb”).

assistant, sub-, vice-, auxiliary, supplemental