While both terms - stock market and stock exchange - are used interchangeably, the latter term is generally a subset of the former. If one says that she trades in the stock market, it means that she buys and sells shares/equities on one (or more) of the stock exchange(s) that are part of the overall stock market. The leading stock exchanges in the U.S. include the New York Stock Exchange (NYSE), Nasdaq, and the Chicago Board Options Exchange (CBOE). These leading national exchanges, along with several other exchanges operating in the country, form the stock market of the U.S.
Pump and dump: this characterises a movement where a group of people with influence will either spread rumours, share hypothetical information or shill (shameless promotion) about a given cryptocurrency project. Their followers will start to buy massively the related cryptocurrency, initiating a « pump » movement, i.e. price starts going up very high and fast. At the same time, the people who spread those rumours will leverage the high increase to do a « dump » movement, i.e. sell the same cryptocurrency (that they had bought at very low prices) at the newly reached high price. The result: the group that initiated the pump will make a large profit, while the people who jumped on the pump train (those who bought in because of FOMO, fear of missing out) will have bought at a high price and are now with an asset that is worth only a fraction of the purchase price