groupWordsByHavingSameLetters.js

/**
 * groupWordsByHavingSameLetters
 *
 * Group the below words by having the same letter but different position
 *
 * @param {Array<string>} arr
 * @returns  {Array<string>}
 */
const groupWordsByHavingSameLetters = arr =>
  Object
    .values(
      arr.reduce((a, c) => {
        const sortedWord = c
          .split('')
          .sort()
          .join('')
        a[sortedWord] = a[sortedWord] || []
        a[sortedWord].push({ word: c })
        return a
      }, {})
    )
    .map(matchArr => 
      matchArr.map(item => item.word).join(' - ')
    )

const data = ['AMOR','XISELA','JAMON','ROMA','OMAR','MORA','ESPONJA','RAMO','JAPONES','ARMO','MOJAN','MARO','ORAM', 'MONJA','ALEXIS']
groupWordsByHavingSameLetters(data)