Acorns are very Catholic as well.
They were also sacred to pagans and symbolic of the gods. The sacred tree of Thor was an oak tree. The acorn is a symbol of fertility and immortality.
Tuck them into garlands, swag about a lovely column - add into festive floral arrangements and wreaths and rings, or include them into the Holiday Tree branches. You can even gild them, or add glitter and moss. Couple them with evergreens, pheasant feathers, mistletoe, and antlers for a genuine forest look.
It's a good thing.