This was a discussion point with Markus K. today. In order to optimize not only spelling or various similar wordings inside a cluster is there a possibility to get suggestions beyond the obvious missspelling etc. Goal for us would be to integrate ALL possible search queries into the existing cluster. example:
Montageprofil -> Clustered already in various spelling types. In addition we need to add: bauprofil, 4kant profil, 6kant profil, profilschiene etc. (infos I do get when I e.g. look at other DIY shops or ask the google keyword planner...