"widespread myth" is correct and usable in written English.
For example, you could use the phrase in a sentence such as: "The idea that the world is flat is a widely-held myth."
That's a widespread myth inside and outside the education world.
No. There's a widespread myth that you can use software for 24 hours without penalty.
There is a widespread myth that his work has more to do with philosophy than literature.
Early research was hampered by the widespread myth that the tusk came from the head of a unicorn.
This situation is fuelled by the widespread myth that cohabiting couples have "common law" rights, combined with existing law that is unclear and often unjust.
In contrast to the clear records of the Second Temple, is the widespread myth that subsequent to its destruction there was an exile of the Jewish people.
Could these widespread myths about No Child Left Behind have poisoned the well? 1.
It was an extraordinarily biased piece of TV that fuelled widespread myths about social security.
The third edition begins with a brief history of bicycles and bicycling that demolishes many widespread myths.
In education efforts about the basic facts of AIDS, a major goal will be to destroy widespread myths in Africa.
The senior author of the paper, Jennifer O'Loughlin, a professor of epidemiology at the University of Montreal, said there were several widespread myths that water pipes are safer than cigarettes.
