The bulk update request #11484 is pending approval.

create alias bakcsack (0) -> backsack (129797)
create alias backsakc (0) -> backsack (129797)
create alias backsac (0) -> backsack (129797)
create alias bacsack (0) -> backsack (129797)
create alias backscak (3) -> backsack (129797)

Reason: Aliases away the most frequent typo variants of backsack.

Tag history:
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=bakcsack
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=backsakc
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=backsac
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=bacsack
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=backscak

Any consecutive combination of c and k tends to short-circuit our brains. A word with two of them is mental kryptonite. There are a lot more typo variants of these with a tag history (dropping one or both c or k, mixing up c and k, using two of c or k, variants of these with a space between, etc.), but I limited this BUR to the most common ones.