Well, actually the original Swedish text is "Synonymerna är helt fria"
Source:
http://lexin2.nada.kth.se/synpairs.xml (see top for that release
notice)
Project:
http://lexin2.nada.kth.se/synlex.html
English Paper about it:
http://www.nada.kth.se/theory/projects/infomat/rapporter/kannrosell05.pdf
C.