| Fourth in a series | 18 |
| Fourth in a celestial progression | 33 |
| Fourth hitter in the batting order | 34 |
| Fourth Hebrew letter | 20 |
| Fourth Greek vowel | 18 |
| Fourth Greek letter | 19 |
| Fourth Greek consonant | 22 |
| Fourth grade? | 13 |
| Fourth excuse | 13 |
| Fourth Estate? | 14 |
| Fourth estate, as it's known | 32 |
| Fourth Estate verb | 18 |
| Fourth estate | 13 |
| Fourth draft | 12 |
| Fourth down option | 18 |
| Fourth down for the offensively challenged? | 43 |
| Fourth down figure | 18 |
| Fourth dimension | 16 |
| Fourth digit of current year | 28 |
| Fourth deck of a ship | 21 |
| Fourth deck | 11 |
| Fourth deadly sin | 17 |
| Fourth day of Christmas arrivals | 32 |
| Fourth Commandment subject | 26 |
| Fourth club member | 18 |
| Fourth century start | 20 |
| Fourth celebration | 18 |
| Fourth canonical hours | 22 |
| Fourth canonical hour | 21 |
| Fourth caliph of Sunni Islam | 28 |
| Fourth caliph of Islam | 22 |
| Fourth caliph in Sunni Islam | 28 |
| Fourth book of the OT | 21 |
| Fourth book of the N.T. | 23 |
| Fourth book of the Book of Mormon | 33 |
| Fourth Book of Mormon | 21 |
| Fourth book in the Book of Mormon | 33 |
| Fourth base? | 12 |
| Fourth base | 11 |
| Fourth Arabic letter | 20 |
| Fourth anniversary gift | 23 |
| Fourth and long strategy | 24 |
| Fourth after F.D.R. | 19 |
| Fourteenth-to-last word before a baseball game begins | 53 |
| Fourteenth U.S. president | 25 |
| Fourteenth fortress | 19 |
| Fourteen-line work | 18 |
| Fourteen-line poem | 18 |
| Fourteen Vatican leaders | 24 |
| Fourteen states border it (abbr.) | 33 |
| Fourteen pounds, to a Brit | 26 |
| Fourteen pounds, in London | 26 |
| Fourteen pounds, in Liverpool | 29 |
| Fourteen pounds, in Britain | 27 |
| Fourteen pounds, in Brighton | 28 |
| Fourteen pounds in Brighton | 27 |
| Fourteen pounds in Brighton | 28 |
| Fourteen pounds | 15 |
| Fourteen in ancient Rome | 24 |
| Foursquare | 10 |
| Foursomes | 9 |
| Foursome, for people who lack taste? | 36 |
| Foursome's social outing | 28 |
| Foursome's gathering place | 30 |
| Foursome times two | 18 |
| Foursome on the town, perhaps | 29 |
| Foursome minus one | 18 |
| Foursome in "A Midsummer Night's Dream" | 53 |
| Foursome for a Ford | 19 |
| Foursome followed by Acts | 25 |
| Foursome | 8 |
| Fourscore minus nine | 20 |
| Fourscore and ten | 17 |
| Fourscore | 9 |
| Fours on a course, often | 24 |
| Fourposters, e.g. | 17 |
| Fourposters | 11 |
| Fourposter, e.g. | 16 |
| Fourposter | 10 |
| Fourpenny ___ | 13 |
| Fourpence | 9 |
| Fourier series functions | 24 |
| Fourier series function | 23 |
| Fourgon | 7 |
| Fourfront? | 10 |
| Fourfold | 8 |
| Fourflusher | 11 |
| Fourbaggers, in MLB | 19 |
| Fourbagger | 10 |
| Four? | 5 |
| Four: Prefix | 12 |
| Four: Pref. | 11 |
| Four: Comb. form | 16 |
| Four: Abbr. | 11 |
| Four: Prefix | 13 |
| Four-_____ | 10 |
| Four-___ boat | 13 |
| Four-___ (kind of fastball) | 27 |
| Four-___ (cravat) | 17 |
| Four-___ (captain) | 18 |