| QUANTUMLEAP | A term for a sudden increase based on a branch of physics (7,4) |
| MERITRAISE | Salary increase based on good job performance |
| BABY | Term for a sudden large increase in the birthrate, ... boom |
| PERCHING | Remaining on a branch (of a bird) |
| WILLIWAW | Seafarer's term for a sudden offshore mountain wind (8) |
| ADEPT | Expert on a branch of government (5) |
| THERMOMETRY | Branch of physics dealing with measurement of temperature (11) |
| SURGE | Based on the Latin "to rise", a word used in its early sense to mean a fountain or stream, later a big wave, a billowing cloud, a sudden increase of power or a rush of emotion (5) |
| ELECTRONICS | Branch of physics and technology (11) |
| SNAP | Word for a sudden audible nip; a snack or nibble; a crack; an earring; a ginger nut; an interjection meaning "same, matching"; a quick photo; a popper; or, a sharp spell of cold (4) |
| CHECK | From a chess term, a word for a sudden stop; or, a test to evaluate the standard of something (5) |
| SURPRISE | From the Latin meaning "to seize", a word for a sudden attack originally, later an astonishing or unexpected event, fact or present etc; or, the feeling of mild shock as a result of said startlement ( |
| SACCADE | Word for a sudden check, jerk or pull on a horse's reins, thus a rapid movement of the eyes, as in reading or REM; or, any abrupt jolt, tic, tug, twitch or other spasmodic repositioning (7) |
| SQUALL | Name for a sudden wind-speed increase of 8 metres per second (18 miles per hour) or more, for one minute or longer. (6) |
| CAPRICE | Word, from Italian for "hedgehog-head", suggesting a shudder in which hair stood on end like said urchin's spines, for a sudden start/fright, mood change, impulsive act or whim (7) |
| REEST | A Scottish word for a sudden form of stubbornness (5) |
| BURST | At the volley of fire, there's a sudden increase in speed (5) |
| BONANZA | A situation creating a sudden increase in wealth or profits (7) |
| THERMODYNAMICS | Mad on chemistry possibly and a particular branch of physics (14) |
| GLINT | Word for a sudden slip, slide or oblique movement first, later a bright gleam, brief indication, momentary flash or a twinkle in the eye (5) |
