overflow-wrap (word-wrap) and word-break behave very similarly and can be used to solve similar problems. word-break is best used with non-English content that require specific word-breaking rules. overflow-wrap can be used regardless of language used.

References

  • https://css-tricks.com/almanac/properties/w/word-break/
  • https://css-tricks.com/almanac/properties/w/word-break/
  • https://css-tricks.com/almanac/properties/w/whitespace/
  • http://stackoverflow.com/questions/1795109/what-is-the-difference-between-word-break-break-all-versus-word-wrap-break/