| Roman household deities | 23 |
| Roman household deity | 21 |
| Roman household god | 19 |
| Roman household gods | 20 |
| Roman household spirit | 22 |
| Roman household spirits | 23 |
| Roman hunt goddess | 18 |
| Roman I | 7 |
| Roman id follower | 17 |
| Roman III | 9 |
| Roman imperator | 15 |
| Roman in charge of buildings | 28 |
| Roman in charge of games | 24 |
| Roman in the movie business | 27 |
| Roman invasion resister | 23 |
| Roman judge | 11 |
| Roman jurist | 12 |
| Roman kindness | 14 |
| Roman king | 10 |
| Roman lad | 9 |
| Roman land | 10 |
| Roman landmark rising from the Piazza di Spagna | 47 |
| Roman lang. | 11 |
| Roman language | 14 |
| Roman law | 9 |
| Roman laws | 10 |
| Roman leader at the Summer Olympics? | 36 |
| Roman leader who met his fate on the Ides of March | 50 |
| Roman leader: 253–60 | 27 |
| Roman leader? | 13 |
| Roman legion eagle, e.g. | 24 |
| Roman legion subdivision | 24 |
| Roman legionaries' shields | 30 |
| Roman letter | 12 |
| Roman love | 10 |
| Roman love god | 14 |
| Roman love goddess | 18 |
| Roman love poet | 15 |
| Roman lover's intro | 23 |
| Roman lyre player | 17 |
| Roman lyric poet | 16 |
| Roman magistrate | 16 |
| Roman magistrate (Var.) | 23 |
| Roman magistrate below a consul | 31 |
| Roman magistrate below a consul (Var.) | 38 |
| Roman magistrates | 17 |
| Roman main rooms | 16 |
| Roman man | 9 |
| Roman market official | 21 |
| Roman marketplace | 17 |
| Roman marketplaces | 18 |
| Roman markets | 13 |
| Roman martial arts star? | 24 |
| Roman matron's garb | 23 |
| Roman maxi | 10 |
| Roman meal | 10 |
| Roman measure | 13 |
| Roman meeting place | 19 |
| Roman meeting places | 20 |
| Roman menswear | 14 |
| Roman metro fare | 16 |
| Roman mid-month | 15 |
| Roman military unit | 19 |
| Roman mine | 10 |
| Roman mineral used for vases | 28 |
| Roman minister of public works | 30 |
| Roman money | 11 |
| Roman moniker | 13 |
| Roman month starter | 19 |
| Roman monument to Constantine | 29 |
| Roman moon deity | 16 |
| Roman moon goddess | 18 |
| Roman moralist | 14 |
| Roman mother's robe | 23 |
| Roman mouths | 12 |
| Roman music halls | 17 |
| Roman musical building | 22 |
| Roman musical? | 14 |
| Roman name | 10 |
| Roman natural historian | 23 |
| Roman naturalist | 16 |
| Roman needle | 12 |
| Roman nonsensical verse? | 24 |
| Roman nose | 10 |
| Roman nose, e.g. | 16 |
| Roman number | 12 |
| Roman numeral | 13 |
| Roman numeral hidden (in left-to-right order) in the four longest Across answers | 80 |
| Roman numeral in a Shakespeare title | 36 |
| Roman numeral representations, often | 36 |
| Roman numeral that translates to a 4-digit palindrome | 53 |
| Roman numeral that's also a name | 36 |
| Roman numeral that's an anagram of part of Caesar's boast | 65 |
| Roman numeral? | 14 |
| Roman numerals for Henry | 24 |
| Roman observation on tippling | 29 |
| Roman odist | 11 |
| Roman of film | 13 |
| Roman of Nebraska | 17 |
| Roman officer | 13 |