Get parameter alias

Get-ParamAlias.ps1

# Enter the cmdlet you want to see parameter variables for:
$cmdlet = 'Get-Process'

$out = @{}

foreach ( $param in (get-command $cmdlet).Parameters.Keys ){
    $aliases = ''
    foreach ( $a in $cmd.Parameters.$param.Aliases ){
        $aliases += "$a " 
    }

    $out.Add($cmd.Parameters.$param.Name, $aliases)
}

$out