keeristorm tähendus null.

whirlwind [whirlwinds]▼◼◼◼noun
[UK: ˈwɜːl.wɪnd] [US: ˈwɜːrˌl.wɪnd]

cyclone [cyclones]▼◼◼◻noun
[UK: ˈsaɪ.kləʊn] [US: sɪˈkloʊn]