Gribbins rhymes with:
bibbins, gibbins, gibbons, bibbins, cobbins, dobbins, dobyns, gibbins, gibbons, gubbins, hobbins, robbins, rubin's, sabins, stebbins, stubbins
Gribbins sounds like:
girobank, grabbing, grabens, grabinski, grapevines, grievance, grievances, grieving, griffin's, griffing, griping, gripping, groping, grouping, groupings, gryphons