Word indexes are not supported at this time with either DataServer for Oracle, or DataServer for Microsoft SQL Server.
Although both foreign databases have full text search capabilities, this is not the same as Progress Word indexing.
An enhancement to the product can be requested through the Progress Community via an Ideas submission. Customer feedback is valuable and Idea submissions are monitored by our Product Management team. Enhancement requests are reviewed during the planning phase of each new product release and a list of the enhancements chosen for implementation can be found in the Release Notes documents that accompany each release. Once an Idea is submitted the Progress Software Community will have the opportunity to comment on and vote for the Idea.
For detailed information on how to submit an Idea, please refer to Knowledge Base article 000010839, "How to submit an idea for a Progress product enhancement (embedded video)