Groupings rhymes with:
bumpings, clippings, droppings, helpings, kidnappings, scrapings, shopping's, stampings, tapings, toppings, trappings, typings
Groupings sounds like:
girobank, grabbing, grabens, grabinski, grapevines, gribbins, grievance, grievances, grieving, griffin's, griffing, griping, gripping, groping, grouping, gryphons