let text = "Some &fucking text for &your && &+. &mom, dear friend."

let regex = try! NSRegularExpression(pattern: "&(\\w+)")
let matches = regex.matches(in: text,
                            range: NSRange(text.startIndex..., in: text))

let words: [String] = matches.map {
    (text as NSString).substring(with: $0.range(at: 1))
}

print(words)