What is another word for on double?
Pronunciation: [ˌɒn dˈʌbə͡l] (IPA) 
On double is a phrase that means doing something quickly or with urgency. There are several synonyms for this phrase that can be used interchangeably, such as at once, immediately, swiftly, promptly, without delay, hastily, urgently, quickly, rapidly, speedily, and expeditiously. These synonyms can be used in various contexts, both formal and informal, to convey a sense of urgency or the need for prompt action. By using these synonyms, we can convey the same meaning of on double in a more diverse way that can make our communication more effective, clear, and engaging.
