| Oxygen-shunning organism | 24 |
| Oxygen-requiring microorganism | 30 |
| Oxygen-needing organism | 23 |
| Oxygen-needing bacterium | 24 |
| Oxygen-loving organism | 22 |
| Oxygen-deprived | 15 |
| Oxygen-dependent organisms | 26 |
| Oxygen-dependent organism | 25 |
| Oxygen-dependent creature | 25 |
| Oxygen-dependent bacterium | 26 |
| Oxygen-consuming organism | 25 |
| Oxygen-consuming bacterium | 26 |
| Oxygen, simply | 14 |
| Oxygen, for one | 15 |
| Oxygen, for instance | 20 |
| Oxygen, e.g. | 12 |
| Oxygen's lack | 17 |
| Oxygen's electrons, e.g. | 28 |
| Oxygen's atomic number | 26 |
| Oxygen's 8: Abbr. | 21 |
| Oxygen ___ | 10 |
| Oxygen variety | 14 |
| Oxygen users | 12 |
| Oxygen user | 11 |
| Oxygen tent site, in brief | 26 |
| Oxygen tent locale, briefly | 27 |
| Oxygen suppliers for scuba divers | 33 |
| Oxygen sources | 14 |
| Oxygen source | 13 |
| Oxygen site: Abbr. | 18 |
| Oxygen sex expert Johanson | 26 |
| Oxygen releaser | 15 |
| Oxygen providers | 16 |
| Oxygen producers | 16 |
| Oxygen producer | 15 |
| Oxygen processor | 16 |
| Oxygen or hydrogen | 18 |
| Oxygen or helium | 16 |
| Oxygen or aluminum | 18 |
| Oxygen network co-founder | 25 |
| Oxygen eschewer | 15 |
| Oxygen emanating from a lawn? | 29 |
| Oxygen doesn't have one | 27 |
| Oxygen discoverer | 17 |
| Oxygen consumer | 15 |
| Oxygen cofounder Winfrey | 24 |
| Oxygen carrier | 14 |
| Oxygen barrier provider | 23 |
| Oxygen bacterium | 16 |
| Oxygen atom's protons, e.g. | 31 |
| Oxygen and neon | 15 |
| Oxygen and helium, for instance | 31 |
| Oxygen allotrope | 16 |
| Oxygen --- | 10 |
| Oxygen | 6 |
| Oxycodone-plus-aspirin brand | 28 |
| Oxycodone-based painkiller | 26 |
| Oxycodone et al. | 16 |
| Oxy-5 target | 12 |
| Oxy, Vike and the like | 22 |
| Oxy treats it | 13 |
| OXY target | 10 |
| Oxy 5 target | 12 |
| Oxy 5 rival | 11 |
| Oxy 10 target | 13 |
| Oxonian, for example | 20 |
| Oxonian's parent | 20 |
| Oxonian "Table Talk" author: 1689 | 43 |
| Oxo rival | 9 |
| OXO alternative | 15 |
| Oxlike grazer | 13 |
| Oxlike critter | 14 |
| Oxlike beast | 12 |
| Oxlike Asian climber | 20 |
| Oxlike antelopes | 16 |
| Oxlike antelope | 15 |
| Oxlike animal | 13 |
| Oxlike African beast | 20 |
| Oxlike African antelope | 23 |
| Oxlike | 6 |
| Oxidizes, in a way | 18 |
| Oxidizes | 8 |
| Oxidized coating | 16 |
| Oxidized | 8 |
| Oxidize | 7 |
| Oxide used in television tubes | 30 |
| Oxide used in picture tubes | 27 |
| Oxide of cerium, yttrium, etc. | 30 |
| Oxide found in clay | 19 |
| Oxidative | 9 |
| Oxidationoutcome | 16 |
| Oxidation-inhibiting | 20 |
| Oxidation's evidence | 24 |
| Oxidation sites | 15 |
| Oxidation result | 16 |
| Oxidation on iron | 17 |
| Oxidation of metal | 18 |
| Oxidation | 9 |
| Oxidant starter | 15 |
| Oxianus Lacus | 13 |