| Rot! |
| Erode |
| Go off |
| Go bad |
| Molder |
| Caries? |
| Putrefy |
| Crumble |
| Go to pot |
| Wear down |
| Urban ___ |
| Decompose |
| Waste away |
| Break down |
| Dental woe |
| Deteriorate |
| Go downhill |
| Disintegrate |
| Cavity cause |
| Crumble away |
| Tooth trouble |
| Tooth problem |
| Dental damage |
| Tooth nemesis |
| Canine's woe? |
| Dental problem |
| Dental concern |
| Fall into ruin |
| Canine problem |
| Become compost |
| Radium activity |
| Reason to drill |
| Termite result. |
| Go bad, as teeth |
| Dentist's detection |
| Dentist's discovery |
| Progressive decline |
| Radioactive process |
| Exhibit radioactivity |
| Cause of radioactivity |
| Emulate a compost pile |
| Sevendust song that rots? |
| Get on with one's half-life? |
| Tooth ___ (cause of a cavity) |
| Radioactive ___ (atomic process) |
| Tooth ___ (problem for a dentist) |
| Dentist's concern, and a hint to what the longest answers have in common |