I use this script to extract all fields from all tables.
select so.[Name] 'Table', sc.ColID 'Seq', sc.[Name] 'Field'
FROM syscolumns sc
INNER JOIN sysobjects so ON so.[ID] = sc.[ID]
WHERE so.xtype in (
'IT' /*Internal table*/
,'U' /*User table */
,'V' /*View */
ORDER BY so.[Name], sc.ColID, sc.[Name]
I use it to populate an Excel spreadsheet where I put filters on 'Table' and 'Field'.
Filtering on a field name shows all tables with that field
Filtering using 'contains' also shows similarly named fields e.g. all fields containing 'Route'
I can also list all fields in a specific table without going to SSMS.