代

representative, representation, delegation, type, example, model

period, epoch, era, age, the times, those days, oldness, ancientness, antiquity, antique, period piece

substitution, material, price, margin (e.g. for stapling, etc.), area required for something, shiro (unit of land area equal to one-fiftieth of a tan; ~19.83 m.sq.)

age, era, period, date

nowadays, modern era, modern times, present-day

generation, the world, the age

world, society, age, generation

alternation, change, relief, relay, shift, substitution (sports, etc.)

to succeed, to relieve, to replace, to take the place of, to substitute for, to take over for, to represent, to be exchanged, to change (places with), to switch

to succeed, to relieve, to replace, to take the place of, to substitute for, to take over for, to represent, to be exchanged, to change (places with), to switch