npm install action-names --save-dev

var actionNames = require('action-names');

var names = actionNames('users');

{
  USERS_FETCH_START:   'USERS_FETCH_START',
  USERS_FETCH_SUCCESS: 'USERS_FETCH_SUCCESS',
  USERS_FETCH_ERROR:   'USERS_FETCH_ERROR',

  USERS_UPDATE_START:   'USERS_UPDATE_START',
  USERS_UPDATE_SUCCESS: 'USERS_UPDATE_SUCCESS',
  USERS_UPDATE_ERROR:   'USERS_UPDATE_ERROR',

  USERS_CREATE_START:   'USERS_CREATE_START',
  USERS_CREATE_SUCCESS: 'USERS_CREATE_SUCCESS',
  USERS_CREATE_ERROR:   'USERS_CREATE_ERROR',

  USERS_DELETE_START:   'USERS_DELETE_START',
  USERS_DELETE_SUCCESS: 'USERS_DELETE_SUCCESS',
  USERS_DELETE_ERROR:   'USERS_DELETE_ERROR',

  // Object also contains aliases
  fetchStart:   'USERS_FETCH_START',
  fetchSuccess: 'USERS_FETCH_SUCCESS',
  fetchError:   'USERS_FETCH_ERROR',

  updateStart:   'USERS_UPDATE_START',
  updateSuccess: 'USERS_UPDATE_SUCCESS',
  updateError:   'USERS_UPDATE_ERROR',

  createStart:   'USERS_CREATE_START',
  createSuccess: 'USERS_CREATE_SUCCESS',
  createError:   'USERS_CREATE_ERROR',

  deleteStart:   'USERS_DELETE_START',
  deleteSuccess: 'USERS_DELETE_SUCCESS',
  deleteError:   'USERS_DELETE_ERROR',
}