A broad toothy smile can be described in a variety of ways with synonyms that capture the essence of the expression. Some similar phrases include a wide grin, a big smile, and a cheerful beam. Other options include a ear-to-ear smile, an expansive grin, and a radiant smile. These phrases all convey a sense of genuine happiness, warmth, and friendliness. A full-toothed smile, an open-mouthed grin, and a jovial expression are also great ways to describe the same type of smile. Whatever phrase you choose, it's clear that a broad toothy smile is a universal symbol of joy and positivity.