I was going to say they're synonymous; checked Wiktionary which calls it 'nonstandard' for sliver, though common in the UK (where I am from and live) blaming 'th fronting'.

I assume that's the name for, ahem, 'that is just anovver word for it'.

I'm Australian so I didn't know about this -- I guess I'll switch to "sliver" since it seems it's more broadly understood.

Thanks for letting me know!

No wuckers ;)

I didn't know either, I only really checked because I was curious if they had a completely different etymology and only happened to be spelt^ and used similarly.

(^or if, like spelt and spelled, the same root had just come to be used in two ways for the same.)

So, note to self, slither is not a noun! (Except to mean limestone rubble apparently, but I think I can ignore that.)

Note to self, "a sliver of hope" is not to be confused with "the silver lining".

In American English, "slither" is more frequently associated with the movement of snakes, specifically. A snake "slithers" by "moving smoothly over a surface with a twisting or oscillating motion." [0]

[0] https://www.google.com/search?q=define%3A+slither

Depends on your opinion of the reptile nature of those doing the controlling.

An animal muppet would know.