The difference between Show up and Turn up

When used as verbs, show up means to appear, arrive, or attend, especially suddenly or erratically, whereas turn up means to show up.

check bellow for the other definitions of Show up and Turn up

Show up as a verb (intransitive):

To appear, arrive, or attend, especially suddenly or erratically.

Examples:

"Please come on time; don't just show up whenever you feel like it."

"No matter how many I throw away, more copies always show up."

"Stains show up easily on this white tablecloth."
Show up as a verb (transitive, idiomatic):

To make visible or expose faults and deficiencies in, usually by comparison.

Examples:

"I finished in five minutes and she showed me up by finishing in three."

"I bet the Jayhawk fast break could show up the Nimrod's lack of speed."
Show up as a verb (transitive):

To make visible; to expose.

Turn up as a verb (intransitive):

To show up; to appear suddenly or unexpectedly.

Examples:

"Is this your pencil that turned up in my drawer?"

"I don't like people turning up without an appointment''."
Turn up as a verb (transitive):

To cause to appear; to find by searching, etc.

Examples:

"I spent hours in the archives, but couldn't turn up anything on the alleged criminal."
Turn up as a verb (transitive):

To increase the amount of something by means of a control, such as the volume, heat, or light.

Examples:

"Turn up the radio and sing along."
Turn up as a verb (transitive):

To reposition by rotating, flipping, etc. upwards.

Examples:

"He turned up his collar against the cold."
Turn up as a verb (transitive, nautical):

To belay or make fast a line on a cleat or pin.

Examples:

"Turn up the [[main]] [[halyard]]."
Turn up as a verb (intransitive, slang):

To party hard, especially when involving alcohol or drugs.

Examples:

"We're going to turn up at the [[concert]] tonight."