The antonyms for the words "Roman holiday" are rather difficult to find, as the phrase itself suggests something of luxury, leisure, and relaxation. Antonyms to these ideas would include concepts of hardship, toil, and struggle. Therefore, antonyms for "Roman holiday" might include phrases such as "grueling work week," "exhausting backpacking trip," or "stressful business trip." These phrases all evoke the opposite of the luxurious and relaxing vacation suggested by "Roman holiday," and instead imply a sense of challenge and difficulty. While such trips may not be as appealing to most people as a Roman holiday, they can still be rewarding in their own way.