Halloween is among the most anticipated holidays of the year. It's an opportunity to indulge in candy and also to dress up and attend a costume party.

But there are dangers to Halloweeen that many should be aware of, particularly if they prefer to stay clean and sober. In 2015, parents may have been shocked to learn about Ecstasy tablets mistaken for brightly colored Halloween candy. Last week in Canada, police in Calgary, Alberta, issued a warning about drug-tainted Halloween candy.

Drug overdose is the top cause of accidental death in the United States, according to a report by the American Society of Addiction Medicine. More than 21.5 million Americans who are 12 years old and older reported suffering from a substance abuse disorder in 2014 -- 1.9 million of which reported struggling with prescription abuse.

While treatment centers have been amping up efforts to provide users with the help they need, something as simple as drug awareness, starting with knowing popular code names for drugs, could be a beneficial first step in prevention.

Here's a list of the most popular terms associated with commonly used substances below:

Marijuana: The cannabis plant is mostly referred to as weed, but a few other names include, Pot, Grass, Green, Trees, Ganja, Mary Jane, Hemp, Bud, Reefer, Hash, Hashish, Chronic, Kush, Herb, Broccoli, Purple Haze, Aunt Mary, Astro Turf, Angola, Spliff, Joint, Dank, Doobee, Flower, Green Goddess, Gerta, Hay, Dro, Jay, Kansas Grass, Loaf, Mary, Roach, Rugs, Sess, Salt and Pepper, Skunk and Loud.

Cocaine: The white powder is also known as Coke, Yayo, Coco, Coca, Cocaina, Betty White, Anna Nicole, Snow, Crack, Powder, Dust, Flake, Toot, Blow, Rock, Gator Tails, Monster Lines, Bernice, Nose Candy, Candy, Line, Bump, Stash, Pearl, Basa, White, Santa, Baseball, C, Big Rush and Rail.

Heroin: Typically administered via injection or smoked, sometimes heroin is called Candy, H, Smack, China White, Dope, Junk, Big H, Mexican Brown, Brown Sugar, Mud, Dragon, Horse, Skag, Scag, Skunk, Black Tar, China White, Boy and Thunder.

Cough Medicine: Most users drink cough syrup to get high or “robotrip” from the main active ingredient dextromethorphan, which is sometimes called Dexies, Drex, Syrup, Robo, Rojo, Triple C, Drank, Sizzurp, Purple Drank, Poor Man’s Ecstasy, Orange Crush, Tussin, Velvet and Red Devils.

OxyContin: The prescription painkiller is also known as Oxy, OC, Ox, O, Oxycotton, 512s, Blues, Kickers and Hillbilly Heroin.

MDMA: This pill or powder cocktail has just as many names as the random chemicals mixed in to make Ecstasy, including X, Molly, E, ETC, Hug Drug, Love Drug, Hug, Lover’s Speed, Rolls, Adam, Clarity, Beans, Happy Pill, Moon Rocks, Scooby Snacks, Candy, Dancing Shoes, Roxy, Tinkerbell, Skittles, Vitamin E, Vitamin X, Sweets, Malcom or Malcom X, Dovs , Disco Biscuts , Thizz, E-Bombs, Pressies and Egg Rolls.

Vicodin: A powerful combination of hydrocodone and acetaminophen, this pain relieving pill is sometimes called Vikes, Vics, Vicos, Hydros, Lorris, Fluff, Scratch, Norco, Idiot Pills Watsons and 357s.

Xanax: People who pop this anti-anxiety medication sometimes call them Xannies, Xan, Bars, Z-bars, Zanbars or Xanbars, Benzos, Happy Pills, Upjohn or Blue Footballs.

Mushrooms: Not meant for cooking, psychedelic mushrooms nicknames include Magic Mushrooms, Shrooms, Boppers, Caps, Buttons, Magics, Boomers, Mushies, Liberty Caps, Liberties, Blue Meanies and Cubes.

LSD: The super powerful psychedelic drug, which sends users on a 12-hour “trip,” is often referred to as Acid, Lucy, Lucy in the Sky with Diamonds, Tabs, Doses, California Sunshine, L, Cid, Yellow Sunshine, Superman, Looney Toons, Dots, Battery Acid and Window Pane.