| 100% | SHELLS | 6 | Conchology is the study of molluscs and these |
| 56% | ODORS | 5 | Osmics is the study of these |
| 56% | INSECTS | 7 | Entomology is the study of this |
| 56% | POLLEN | 6 | Palynology is the study of this |
| 56% | FRUITS | 6 | Pomology is the study of growing these |
| 56% | INSECTS | 7 | Entomology is the study of these animals |
| 55% | COMPUTERS | 9 | Cyberphobia is the fear of technology and these |
| 55% | DISEASES | 8 | Epidemiology is the study of the spread of these |
| 52% | ZYMOLOGY | 8 | This or zymurgy is the study of fermentation |
| 50% | AGENCIES | 8 | HMRC and the CIA are examples of these |
| 49% | LIGHTNING | 9 | Chaac was the Maya god of rain, water and this |
| 49% | HAPPINESS | 9 | What the science of well-being studies ... and the theme of this puzzle |
| 48% | ANTELOPE | 8 | The impala and nyala are this kind of animal |
| 48% | ECLIPSE | 7 | This was Total and of the Heart, for Bonnie Tyler |
| 48% | STRIKES | 7 | Three of these and the batter is out |
| 47% | ELMO | 4 | This saint is the patron of sailors — and also of abdominal pain |
| 47% | LANGUAGES | 9 | Linguistics is the study of __ |
| 47% | IJUSTMETYOU | 11 | "Hey, ___, and this is crazy ..." (start of the chorus in 40-Across): 4 wds. |
| 46% | WAR | 3 | What polemology is the study of |
| 46% | MARS | 4 | What areology is the study of |
| 46% | CLOUDS | 6 | What nephology is the study of |
| 46% | WARS | 4 | Polemology is the study of them |
| 46% | SOUND | 5 | Acoustics is the study of it |
| 46% | AGING | 5 | What gerontology is the study of |
| 46% | TAPS | 4 | Link to this solo (and a copy of the words, too) can be found on the Army Study Guide website |
| 46% | MESSAGES | 8 | Cryptography is the study of decoding secret __ |
| 46% | OTTOMAN | 7 | Mehmed VI Vahideddin, 1861-1926, was the 36th and final Sultan of this once great Empire |
| 46% | ATOMICPILE | 10 | The first one of these was built by Fermi and his team in 1942 |
| 46% | JOHNOFARRELL | 12 | Author of the novels This Is Your Life and May Contain Nuts |
| 45% | THEYD | 5 | "And this was scarcely odd, because ___ eaten every one" (end of "The Walrus and the Carpenter") |