| Answer | Crossword Clue |
|---|---|
| REACT | Acknowledge a stimulus |
| REACTS | Answers a stimulus |
| CATALYST | Stimulus of a kind |
| REACT | Respond to a stimulus |
| REACTED | Responded to a stimulus |
| REFLEX | Response to a stimulus |
| REACTING | Responding to a stimulus |
| REACT | Answer to a stimulus |
| REACTS | Responds to a stimulus. |
| REACTION | Response to a stimulus |
| REACT | Respond to a stimulus. |
| REACTS | Responds to a stimulus |
| TROPISM | Response to a stimulus, biologically |
| ECHO | This may follow a stimulus |
| REACT | Be moved by a stimulus |
| REACT | Change in response to a stimulus |
| REACTOR | That which responds to a stimulus. |
| ABIENT | Tending to avoid a stimulus or situation |
