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    For the PCRE, I'd use 'Icecream\S+' for some non-blank characters. Commented Jun 8, 2018 at 20:19
  • Thanks for your comments, saddly it seems that my version of grep does not support perl regex. Could you add some more details about your third option? I am not quite sure how to implement it. Commented Jun 8, 2018 at 21:54
  • After some more testing it seems that using either echo "$string" | grep -oP 'Icecream.*?\b' or 'Icecream\S+' it does the job. Thanks Commented Jun 8, 2018 at 22:09
  • it's really confusing that although your $string variable is a string you still have to put it between double quotes! Commented Jun 8, 2018 at 22:10
  • @Sonamor in this case the quoting is not strictly necessary; however there are so many cases where it is that it's a good habit to get into. See for example When is double-quoting necessary? Commented Jun 8, 2018 at 23:09