Nominatim could search for relations names
|Reported by:||yvecai||Owned by:||geocoding@…|
It would make sense to have some results on name search for relations type=route and type=site.
For example this one: http://www.openstreetmap.org/browse/relation/1439729
or this one: http://www.openstreetmap.org/browse/relation/27005
Giving a centroid lon-lat should be enough, I guess.