This list for “Fire on all cylinders” contains entries used in published crosswords that featured the same wording. Each answer was confirmed through puzzle completions, not guesswork.
Answer List:
- HUM
Synonyms and Definitions
HUM
- Synonyms: busyness, buzz, harkat ul-ansar, harkat ul-mujahedeen, harkat-ul-mujahidin, hua, humming, movement of holy warriors, seethe, thrum