The bulk update request #11396 is pending approval.

create alias pilow (0) -> pillow (90286)
create alias pilows (0) -> pillow (90286)

Reason: Catches one frequent typo and the infrequent pluralized version of it:
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=pilow
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=pilows

This typo likely occurs due to pilow reading as a homophone to pillow for some.