Thank you for your feature request.
Currently, RadSpell does not offer the requested functionality to use the NHunspell API to check for suggestions and use the Thesaurus dictionary. Nevertheless, I logged this feature in our PITS system with ID 2686 and we will try to provide it for the next major Q3 2010 release of RadControls for ASP.NET AJAX.
I also updated your Telerik points for your feature request.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items