Mass and Over-crowding

Mass noun - A considerable amount.

Over-crowding and mass are semantically related In some cases you can replace phrase "Over-crowding" with "Mass", this terms are similar.

Nearby Words: massed, massing, massive

Over-crowding noun - Excessive crowding.

Mass and over-crowding are semantically related in crowd topic. Sometimes you can use "Mass" instead the phrase "Over-crowding" as a noun or a verb, if it concerns topics such as cram, blockage.