We don't have synonyms for open-source yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are open source and opensource.
(adj) :
(software) Of or relating to software where the source code is freely available and licensed in a manner that permits modification and redistribution.
(adj) :
(by extension) Describing any product whose composition or method of manufacturing is public knowledge and not proprietary.
(v) :
(transitive, computing) To release the source code of, so as to permit modification and redistribution.
(adj) :
(espionage) Relying on publicly available information (open sources).
(adj) :
(software) Of or relating to software where the source code is freely available and licensed in a manner that permits modification and redistribution.
(adj) :
(by extension) Describing any product whose composition or method of manufacturing is public knowledge and not proprietary.
(v) :
(transitive, computing) To release the source code of, so as to permit modification and redistribution.
(adj) :
(espionage) Relying on publicly available information (open sources).