| 100% | HEATLAMP | 8 | Infrared source of warmth in a reptile's vivarium |
| 46% | HEATLAMPS | 9 | Sources of warmth in terrariums |
| 45% | EGRET | 5 | Source of a feather in one's cap? |
| 44% | SKYCAM | 6 | Source of a bird's-eye view in football |
| 44% | FIRE | 4 | Source of warmth at a campsite |
| 43% | TAP | 3 | Source of water in a kitchen |
| 43% | SOAP | 4 | Source of foam in a bath |
| 43% | STOVE | 5 | Source of heat in a kitchen |
| 43% | ELM | 3 | Source of shade in a glade |
| 43% | TREE | 4 | Source of shade in a park |
| 43% | AHI | 3 | Source of protein in a poke bowl |
| 41% | THEFORCE | 8 | Source of power in a series of blockbuster sci-fi films |
| 41% | LITTLEBIRD | 10 | Source of a secret, in a phrase |
| 41% | AAA | 3 | Source of a motel discount, in brief |
| 41% | SHEANUT | 7 | Source of a butter used in moisturizers |
| 41% | TEXTBOOKS | 9 | The sources of information in a course |
| 40% | TRAUMA | 6 | Source of add-on damages in a lawsuit |
| 40% | ROTC | 4 | Source of a deferment in the 1960s draft |
| 40% | PHONE | 5 | Source of a light in the darkness, perhaps |
| 40% | COMET | 5 | Source of the meteors in a meteor shower |
| 40% | EGGWHITES | 9 | Possible source of protein in a protein shake |
| 40% | HEADLIGHT | 9 | Source of illumination found in front of a car |
| 40% | TUNAOIL | 7 | Source of healthful fatty acids in a StarKist can |
| 40% | TOASTER | 7 | Source of a burning smell in the kitchen, maybe |
| 40% | BEETS | 5 | Source of the "blood" in a meatless burger, maybe |
| 40% | LOTUSTREE | 9 | Source of a sleep-inducing narcotic in the "Odyssey" |
| 39% | YEW | 3 | Tree that was the source of the poison in Christie's A Pocket Full of Rye |
| 37% | YETI | 4 | Purported source of a footprint photographed on Mount Everest in 1951 |
| 37% | HANDFUL | 7 | "I will show you fear in a __ of dust": T S Eliot |
| 36% | FIRE | 4 | Camper's source of warmth |