We currently have a number of tags related to the graduate admissions and the job search. application, application-letter, cover-letter, faculty-application, graduate-admissions, job-search, statement-of-purpose. The tag wikis for postdocs and tenure-track also suggest they include aspects of the job search.
It seems reasonable to split questions about admissions into graduate school from searches for employment, but I am not sure where application falls into this mix. It is also not clear to me if subdividing the search for employment into categories is really needed, but it seems like we should do it somewhat consistently. I think we should at a minimum re-tag the relevant questions under postdocs and tenure-track as job-search or maybe even split job-search and faculty-application into postdoc-application, non-tenure-track-application, and tenure-track-application.
I am not sure how to handle application-letter, cover-letter, and statement-of-purpose. The statement-of-purpose tag seems popular enough that we probably want to keep it, but I am less convinced that the others are really needed (apart from being synonyms).