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    boom

    US /bum/

    UK /bu:m/

    • Noun (Countable/Uncountable)
    • Very fast increase in growth or popularity
    • A very loud and deep sound
    • Intransitive Verb
    • To experience a rapid increase in growth
    • To make a very loud and deep sound
    penetrate

    US /ˈpɛnɪˌtret/

    UK /ˈpenɪtreɪt/

    • Transitive Verb
    • To enter or pass through something
    • To gain a market in a new area or country
    bang

    US /bæŋ/

    UK /bæŋ/

    • Transitive Verb
    • To strike something loudly or forcefully
    • Noun
    • Sudden loud noise, as when a bomb explodes
    • A loud noise
    rocket

    US /ˈrɑkɪt/

    UK /'rɒkɪt/

    • Noun
    • Powerful engine that releases hot gases
    • Dark green, hot-tasting salad leaf
    • Verb (Transitive/Intransitive)
    • To travel, increase, or rise very quickly
    • To increase very rapidly and suddenly.
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