>>>>Hi everybody,
>>>>
>>>>The word "advice" is a noun, while "advise" is a verb. However, I see lots of messages, even from the native speakers, where "advise" is used as a noun. I'm wondering, what other examples for "c" in a noun and "s" in a verb exist?
>>>>
>>>>Thanks in advance.
>>>
>>>
>>>Reminds me that there is an english word that has two opposite meanings - but the same word. Can you think of it?
>>
>>I can think of a few that sort of fit, but the one that seems most likely to me is 'cleave', or possibly 'enjoin'.
>
>Very good! I was thinking of 'cleave.'

There are other close fits too

Bad - bad
Bad - slang for good.
Sanction - to condone
Sanction - to bar by coercion

The more I think about it, 'enjoin' might fit just a tad better.
Cleave - to adhere is an intransitive verb
Cleave - to split apart is a transitive verb
But
Enjoin - to direct by order is a transitive verb
Enjoin - to prohibit by order is a transitive verb

So 'enjoin' has opposite meanings even while retaining the same construction.