| Caustic drain opener | 20 |
| Caustic drain unclogger | 23 |
| Caustic drain-opener | 20 |
| Caustic fluid | 13 |
| Caustic fluids | 14 |
| Caustic in manner | 17 |
| Caustic in speech | 17 |
| Caustic language | 16 |
| Caustic liquid | 14 |
| Caustic liquids | 15 |
| Caustic material | 16 |
| Caustic materials | 17 |
| Caustic matter | 14 |
| Caustic mixtures | 16 |
| Caustic potash | 14 |
| Caustic potash, e.g. | 20 |
| Caustic remark | 14 |
| Caustic retort | 14 |
| Caustic salt | 12 |
| Caustic soapmaking compound | 27 |
| Caustic soaps | 13 |
| Caustic soda | 12 |
| Caustic soda, chemically | 24 |
| Caustic soda, symbolically | 26 |
| Caustic soda, to a chemist | 26 |
| Caustic solution | 16 |
| Caustic solutions | 17 |
| Caustic stuff | 13 |
| Caustic stuff in Drano | 22 |
| Caustic substance | 17 |
| Caustic substances | 18 |
| Caustic TV barmaid | 18 |
| Caustic used in soapmaking | 26 |
| Caustic wit | 11 |
| Caustic, as a remark | 20 |
| Caustic, as wit | 15 |
| Caustic, as words | 17 |
| Caustic, in a way | 17 |
| Caustics | 8 |
| Caustics in soaps | 17 |
| Caustics made from ashes | 24 |
| Cauterize | 9 |
| Cauterize cattle | 16 |
| Cauterize, e.g. | 15 |
| Cauterized | 10 |
| Cauterizes | 10 |
| Cauterizing | 11 |
| Cauterizing material | 20 |
| Cautery | 7 |
| Cauthen in the irons | 20 |
| Cauthen or Martin | 17 |
| Cauthen or Pincay | 17 |
| Cauthen's controls | 22 |
| Cauthen's mounts | 20 |
| Caution | 7 |
| Caution against neglect | 23 |
| Caution before a long drive | 27 |
| Caution before making a wild assertion | 38 |
| Caution beforehand, with "off" | 40 |
| Caution earnestly | 17 |
| Caution light | 13 |
| Caution light's color | 25 |
| Caution re this puzzle | 22 |
| Caution signal | 14 |
| Caution tag | 11 |
| Caution to a game show audience | 31 |
| Caution to a German shepherd, say | 33 |
| Caution to drivers | 18 |
| Caution to one getting too hot? | 31 |
| Caution to one who overlooks you? | 33 |
| Caution! | 8 |
| Caution, pleonastically | 23 |
| Caution-light color | 19 |
| Cautionary adage | 16 |
| Cautionary advice | 17 |
| Cautionary beginning? | 21 |
| Cautionary color | 16 |
| Cautionary color? | 17 |
| Cautionary conjunction | 22 |
| Cautionary data entry acronym | 29 |
| Cautionary data-entry acronym | 29 |
| Cautionary device | 17 |
| Cautionary list items | 21 |
| Cautionary note | 15 |
| Cautionary novelist | 19 |
| Cautionary reply #1 | 19 |
| Cautionary reply #3 | 19 |
| Cautionary road sign | 20 |
| Cautionary sign | 15 |
| Cautionary sign at a dog park? | 30 |
| Cautionary song about condiments? | 33 |
| Cautionary tale | 15 |
| Cautionary word | 15 |
| Cautionary word on the road | 27 |
| Cautionary ___ | 14 |
| Cautioned | 9 |
| Cautioning road sign | 20 |
| Cautioning word | 15 |
| Cautions | 8 |
| Cautious | 8 |