下働き[shitabataraki] subordinate work
共働き[tomobataraki] (husband and wife) both working
勤め働く[tsutomehataraku] to work diligently
軽労働[keiroudou] light labor
港湾労働者[kouwanroudousha] longshoreman

自働[jidou] automatic
自働化[jidouka] automation
実働時間[jitsudoujikan] actual work hours
囚人労働[shuujinroudou] prison labor
重労働[juuroudou] heavy labor

拮抗[kikkou] rivalry
拮据[kikkyo] diligence
勢力拮抗[seiryokukikkou] struggle for supremacy between evenly-matched forces (parties)

戦力拮抗[senryokukikkou] struggle for supremacy between evenly-matched armies (teams)
拮抗筋[kikkoukin] antagonist (muscle)