There would probably be some additional, specific undergraduate courses that a graduate psychology or SW program would expect you to take in order to be eligible, but it certainly couldn't hurt to ask at schools
you're interested in.
Are you looking to do a graduate degree in another field in order to get out
of nursing, or to further your career in
nursing? If you want to get out of nursing, or do the additional degree just for the personal satisfaction/enrichment, great, but don't expect an advanced degree in another field to help you professionally within nursing.
Best wishes for your journey!