How do I group together multiple regular expressions using grep?

[indigowinged]

( regex | regex | regex ) Is used to group together regular expressions.

Example text file used.

$ cat textfile
The big bounty
Big news is here
The big shake-up

We want to match different words after the word big.

$ grep -E "\<big (bounty|shake-up)" textfile
The big bounty
The big shake-up