import org.openmrs.validator.ConceptValidator
import org.springframework.validation.Errors
import org.springframework.validation.BindException

validator = new ConceptValidator()

concept.getAllConcepts().each(){
    Errors e = new BindException(it, "concept")
    try {
        validator.validate(it, e)
    } catch (Exception ex) {
        println it.toString() + " ERROR: " + ex
    }
    if (e.hasErrors())
        println it.toString() + ": " + e.getAllErrors()
}

​==========================

6866 ERROR: org.openmrs.api.DuplicateConceptNameException: 'NUMBER OF BEDNETS IN HOUSEHOLD' is a duplicate name in locale 'en'
6867 ERROR: org.openmrs.api.DuplicateConceptNameException: 'NUMBER OF BEDNETS IN HOUSEHOLD' is a duplicate name in locale 'en'