| Hydrochloric e.g. | 18 |
| Hydrochloric and boric | 22 |
| Hydrochloric and others | 23 |
| Hydrochloric or amino | 21 |
| Hydrochloric or amino, e.g. | 27 |
| Hydrochloric solution | 21 |
| Hydrochloric ___ | 16 |
| Hydrochloric, e.g. | 18 |
| Hydrochloric, for one | 21 |
| Hydrocortisone additive | 23 |
| Hydrocortisone cream from Palindromic Products, Inc.? | 53 |
| Hydrocortisone producer | 23 |
| Hydrocortisone target | 21 |
| Hydrodynamic duo | 16 |
| Hydroelectric agcy. | 19 |
| Hydroelectric dam-building agcy. | 32 |
| Hydroelectric facility | 22 |
| Hydroelectric option | 20 |
| Hydroelectric org. | 18 |
| Hydroelectric power agcy. | 25 |
| Hydroelectric power projects | 28 |
| Hydroelectric power site | 24 |
| Hydroelectric project | 21 |
| Hydroelectric structure | 23 |
| Hydroelectric structures | 24 |
| Hydroelectricity providers? | 27 |
| Hydroelectricity sources | 24 |
| Hydroelectricity structure | 26 |
| Hydroelectricity suppliers? | 27 |
| Hydrofluoric ___ | 16 |
| Hydroforming machine part | 25 |
| Hydrogen and helium | 19 |
| Hydrogen and methane | 20 |
| Hydrogen and methane (Var.) | 27 |
| Hydrogen and oxygen | 19 |
| Hydrogen and oxygen, e.g. | 25 |
| Hydrogen atom's lack | 24 |
| Hydrogen bomb physicist Edward | 30 |
| Hydrogen bomb, for short | 24 |
| Hydrogen compound | 17 |
| HYDROGEN GAS | 12 |
| Hydrogen has one | 16 |
| Hydrogen or helium | 18 |
| Hydrogen or neon | 16 |
| Hydrogen sulfide characteristic | 31 |
| Hydrogen sulfide smell-alike | 28 |
| Hydrogen's atomic number | 28 |
| Hydrogen's number | 21 |
| Hydrogen, e.g. | 14 |
| Hydrogen, for one | 17 |
| Hydrogenated oil | 16 |
| HydrogenÂ’s lack | 19 |
| Hydrologist's field: Abbr. | 30 |
| Hydrolysis atom | 15 |
| Hydrolysis product | 18 |
| Hydromassage facilities | 23 |
| Hydromassage facility | 21 |
| Hydrometer scale | 16 |
| Hydronium, e.g. | 15 |
| Hydrophane or isopyre | 21 |
| Hydrophane, e.g. | 16 |
| Hydrophobia | 11 |
| Hydrophobic | 11 |
| Hydroplane | 10 |
| Hydroplane part | 15 |
| Hydroplaned | 11 |
| Hydroplanes | 11 |
| Hydroplaning results | 20 |
| Hydroponics subjects | 20 |
| Hydros : England :: ___ : U.S. | 30 |
| Hydrospace | 10 |
| Hydrosphere components | 22 |
| Hydrotherapy facility | 21 |
| Hydrotherapy haven | 18 |
| Hydrotherapy locale | 19 |
| Hydrotherapy option | 19 |
| Hydrotherapy place | 18 |
| Hydrotherapy provider | 21 |
| Hydrotherapy setting | 20 |
| Hydrotherapy site | 17 |
| Hydrotherapy sites | 18 |
| Hydrotherapy spot | 17 |
| Hydrotherapy venue | 18 |
| Hydrous magnesium silicate | 26 |
| Hydrous salt | 12 |
| Hydrox addition | 15 |
| Hydrox alternative | 18 |
| Hydrox alternatives | 19 |
| Hydrox competitor | 17 |
| Hydrox finish | 13 |
| Hydrox look-alike | 17 |
| Hydrox rival | 12 |
| Hydrox rival, now that Hydrox is back on the market | 51 |
| Hydrox rival, once | 18 |
| Hydrox rivals | 13 |
| Hydrox rivals, once | 19 |
| Hydroxide | 9 |
| Hydroxide solution | 18 |
| Hydroxide, e.g. | 15 |
| Hydroxl group compound | 22 |