Q:

Delete the [wish], [harry-potter], and other tags?

IMO, wish (deleted) and harry-potter (deleted) do not appear to serve any useful purpose and can be deleted. Other tags which appear ripe for deletion/synonymisation:

ic 
ian
tech-speak
management-speak
genericized-trademarks
polisemy
productiveness

I'm not sure about these either:

untagged
idiomaticity (Suggested as a synonym of idioms)
acceptability

Edit: I've added a (deleted) note to those tags which have been deleted. Users who can should visit the suggested synonyms page and vote on any pending suggestions.

A:

Yes, delete those tags! I just noticed the wish tag too! There are four instances of it, I believe. Consider also as candidates for deletion:

schwa: There is only one question on the entire site with that tag. 
word and its synonym words: It seems to be used primarily by one person (user account).
term and terms: Neither have any associated questions.

A:

I agree.
Synonyms will stop deleted tags being resurrected in the future.
Perhaps management-speak should be a synonym of business-language.
Perhaps tech-speak should be a synonym of computing.
Perhaps idiomaticity should be a synonym of idioms.

A:

Questions with genericized-trademarks should have been retagged with trademarks, rather than untagged. Unless trademarks should be deleted, or genericized-trademarks were a mistagging in the first place. Please take more care next time!

