Outmoded and Old-hat

Outmoded adjective - Out of fashion.

Old-hat is a synonym for outmoded. In some cases you can use "Old-hat" instead an adjective "Outmoded". obsolete substitute

Old-hat adjective - Out of fashion.

Outmoded is a synonym for old-hat in gone topic. You can use "Outmoded" instead an adjective phrase "Old-hat", if it concerns topics such as old-fashioned, antiquated, in vogue.