| Common campus transportation |
| Activity suggested by this puzzle's theme entries |
| Activity of a ghost in a flat? |
| Common barn roof |
| Activity of many Americans |
| Common bridal flower |
| Activity requiring a crash course? |
| Chef's activity, at times |
| Activity dreaded by QB's |
| French-speaking country where illegal activity runs rampant? |
| Activity at a doctor's office |
| Common woman? |
| Commonwealth in Boston, e.g.: Abbr. |
| Commonwealth Day month |
| Tummy sound — discover (an illicit activity) |
| Frat brother's activity |
| Altruistic activity |
| Common sites for Christmas lights |
| Overnight activity and where it's done |
| Common" sickness |
| Common injury location |
| Most common of the noble gases |
| All I'm saying is . . ." online |
| Common catalyst |
| As an online discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches one," for one |
| Common computer typeface |
| Common name of the tympanic membrane, located in the head |
| Activity around the block |
| Online tracker |
| Online site for people to communicate on particular topics |