I found small movable groin lump sore to touch what could it be?

Lymph node. Would be one common possibility. These swell and become tender whenever there is inflammation or infection in the region. Occasionally a hernia might occur in this area, but it is less common for females. If it doesn't resolve on its own in a couple of weeks, have your doctor check it.
Different thibgs. Would need a physical exam to tell. Possibilities include lymph node, skin infection, hernia, etc.