[homebrewer]

This can be improved by using a better entropy source.

  shuf -n 5 --random-source /dev/urandom /usr/share/dict/words | paste -sd ' '

[keepamovin]

Nice! But on Darwin I need to do:

  shuf -n 5 --random-source /dev/urandom /usr/share/dict/words | tr '\n' ' '

As paste complains about working with a pipe