Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
When your device receives the alert it will vibrate and play a loud siren-like sound for up to 10 seconds.
Source: https://www.independent.co.uk/news/uk/home-news/emergency-alert-system-test-phones-b2303467.html