1
general::
immediately
very soon after something else happens, and without any delay:
• Sam immediately offered to help.
at once
immediately – used especially for emphasis:
• Remove the pie from the oven and serve at once. • He came home at once when he heard his wife was ill.
right away
( also straightaway British English ) especially spoken immediately, especially because something is urgent. Right away and straight away are less formal than immediately , and are very common in everyday spoken English:
• If this happens, let us know right away. • I apologized straightaway.
instantly
if something happens instantly, it happens immediately after something else, with almost no time between:
• The boy was killed instantly. • The message is sent instantly from your computer.
right now/this minute
spoken if someone orders you to do something right now, they want you to do it immediately, especially because they are annoyed with you:
• The head teacher wants to see you right now.
without delay
immediately, because it is important that you do something as soon as possible:
• If you lose your passport, you should contact the embassy without delay.
Longman-Thesaurus