| Underground burial chamber |
| Common campus transportation |
| Pleasure grounds |
| Common barn roof |
| Common bridal flower |
| Result of accidentally throwing a Frisbee into a campground? |
| Affording grounds for a certain premium |
| Commonwealth in Boston, e.g.: Abbr. |
| Common woman? |
| Commonwealth Day month |
| Pioneering underground publication of the 1960s |
| Common sites for Christmas lights |
| Miss Marple finds them |
| Most common of the noble gases |
| Turndowns from Groundskeeper Willie of "The Simpsons |
| Maryland site of Army Proving Grounds. |
| Common injury location |
| Common" sickness |
| Actress MacDowell of "Groundhog Day |
| Common name of the tympanic membrane, located in the head |
| Common catalyst |
| Common computer typeface |
| Paris underground system |
| Common birds, in puzzles |
| New father's task, maybe ... and what the three other longest puzzle answers have in common? |
| Common parental "explanation |
| Groundbreaking person |
| Playground equipment |
| Common crystals, chemically |
| Common slur on political talk radio |