I suggest renaming the tag
hierarchy which is both easier to write and more accepted.
hierarchical is the Queen's English. In Murica' we can also spell it
hierarchal and this would skirt that issue.
I originally created hierarchical as a target for two synonyms containing the word hierarchical.
On reflection, hierarchy would have been a better name, so I have renamed it as requested.
updating post history, 133 rows affected updating posts, 113 rows affected removing/renaming old tag, 1 rows affected tag remapping of [hierarchy] and [hierarchical] complete remapping 2 synonyms 3 favorite and ignored tags remapped 53 tracked tag badges were remapped
Renaming is easily undone in case there is an outcry.