Know-all and Show-off

Know-all noun - Someone who thinks he knows everything and refuses to accept advice or information from others.

Show-off and know-all are semantically related. In some cases you can use "Show-off" instead a noun phrase "Know-all".

Show-off noun - Someone who deliberately behaves in such a way as to attract attention.

Know-all and show-off are semantically related. Sometimes you can use "Know-all" instead a noun phrase "Show-off".