Inability and Slip of the tongue

Inability noun - The lack of sufficient ability, power, or means.

Slip of the tongue and inability are semantically related. In some cases you can use "Slip of the tongue" instead a noun "Inability".

Slip of the tongue noun - An accidental and usually trivial mistake in speaking.

Inability and slip of the tongue are semantically related. Sometimes you can use "Inability" instead a noun phrase "Slip of the tongue".