Source: https://dadfixeseverything.com/binky-vs-pacifier/
Doing a quick search, there seems to be a lot of overlap between the tags.
`binky` has [32 images](/search?q=binky), of which [only 9](/search?q=binky%2C-pacifier) do not also have the `pacifier` tag.
~`binkie` meanwhile only has [1 image](/search?q=binkie) (nsfw, foalcon), which makes me think it's a typo, but could just as easily be an alternate spelling given that the term exists on [urban dictionary](https://www.urbandictionary.com/define.php?term=binkie).~
There are _some_ differences in context between `binky`, `binkie`, and `pacifier`, but I believe they're similar enough to justify an alias.