Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun underboss
1 sense of underboss
Sense 1
underboss -- (an assistant or second-in-command to a chief (especially in a crime syndicate))
=> assistant, helper, help, supporter -- (a person who contributes to the fulfillment of a need or furtherance of an effort or purpose; "my invaluable assistant"; "they hired additional help to finish the work")