ground swell

plural ground swells

1. alternativeAlternative form of groundswell.

   Beachbreaks excepted, ground swells generally produce high-quality surf.

   2005, Matt Warshaw, The Encyclopedia of Surfing, page 239

   1 more example

   This is reflected in the ground swell of unease and criticism reported by our opinion poll evidence this morning, and in recent election results, such as those last week in Hamilton and Wigan.

   1999 September 26, “Blair: doing well, could do better”, in The Guardian