• Union agitator
• Union agreement
• Union army bushwacker
• Union bashing
• Union boilermaker
• Union decertification
• Union dues
• Union featherbedding
• Union fink
• Union ironworker
• Union joiner
• Union laborer
• Union leader
• Union longshoreman
• Union longshoremen
• Union meeting
• Union membership
• Union metalworker
• Union negotiations
• Union of expressmen