joint establishment (esp. schools of different levels or different courses of study);  establishment as an annex (e.g. of a school);  juxtaposition;  placing side by side
 using together (jointly);  used at the same time
 merger;  joining into one;  amalgamation;  melding;  merging;  annexation
 running parallel (to);  running side-by-side;  keeping pace (with)
 concurrence;  coincidence;  complication (in illness)
 annexation;  merger;  swallowing up
 going side-by-side;  going abreast;  running concurrently;  occurring at the same time;  keeping pace with
 applying to enter more than one school
 keeping pace with;  keeping abreast of;  advancing together
 placing side by side;  running simultaneously (e.g. classes);  juxtaposition
 reading (two or more books, etc.) at the same time;  subscribing to multiple newspapers
 annexation of Korea (by Japan; 1910-1945)
 owning together;  combination
 including (an extra work) within the same book, DVD, etc.
 concurrent selling (e.g. of old and new models);  selling (related products) alongside each other;  selling (the same product) in more than one place (e.g. online and in store)
 concurrent offenses;  concurrent offences
 complication (in illness)
 carrying a related article (e.g. magazine);  publishing a related article
 Japan-Korea Annexation Treaty (1910)
 taking entrance tests for multiple schools
 combining a pair of events;  joint
 Chalcolithic period (i.e. the Copper Period)
 Japan-Korea Annexation Treaty (1910)
 Chalcolithic period (i.e. the Copper Period)
 sort-merge file description entry
 combined treatment;  combination therapy
 being so broad-minded as to accept all sorts of things, both good and evil;  being broad-minded enough to be tolerant of people of all shades