Slip of the tongue and Tongue twister

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

Tongue twister and slip of the tongue are semantically related. In some cases you can use "Tongue twister" instead a noun phrase "Slip of the tongue".

Tongue twister noun - An expression that is difficult to articulate clearly.

Slip of the tongue and tongue twister are semantically related. You can use "Slip of the tongue" instead a noun phrase "Tongue twister".