Dependable dividend stocks that routinely grow their payouts are welcome in any environment. But they seem especially attractive nowadays.Stock market volatility is back with a vengeance. The Dow Jones Industrial Average went from powering ahead to an all-time high of 26,828 on Oct. 3 to losing 8% in the span of about three weeks. These kinds of rocky markets tend to give investors motion sickness. But they can add a dose of Dramamine to their portfolios - in the form of reliable dividend-growth stocks."Dividend growers, which tend to be quality companies, have generally shown greater resilience in unsteady markets and could address concerns about dividend stocks in a rising-rate environment," write Tianyin Cheng, director of strategy and ESG Indices at S&P; Dow Jones Indices; and Vinit Srivastava, head of strategy and ESG indices at S&P; Dow Jones Indices. "This argument applies to not only to the U.S. large-cap space, but it also extends to small- and mid-cap segments and international markets."Dividend stocks - both at home and abroad - with long track records of rock-solid rising payments tend to generate superior returns over long periods of time and can help investors weather shorter periods of market turbulence.This is a look at the most reliable long-term dividend stocks in the world. Dubbed the "Dividend Aristocrats," they have raised dividends for at least five straight years (Canadian firms), 10 years (E.U.-based firms) or 25 years (U.S. companies). Such stocks provide reliable and rising income streams - and a sense of security that will help you sleep better at night. We've listed them here alphabetically; take a look. SEE ALSO: 25 Stocks Every Retiree Should Own