navvy (n.)

• breadwinner
• digger
• dredge
• dredger
• employee
• excavator
• flunky
• groundhog
• hand
• jobber
• jobholder
• laborer
• menial
• migrant
• miner
• proletarian
• roustabout
• sapper
• servant
• stiff
• temporary
• toiler
• worker
• workingman
• workman