While both have to very different meanings, both have a definition of meaning something small (alley - small passage, pony - small horse, pour, or amount of money). Both are 6 letters, but when made plural, are spelling differently (alleys - just add s, ponies - drop the y, add ies). Both are Latin in origin, changing letter to French. But alley is late middle English, with pony being from the mid 17th century.
Formal and informal<span> language serve different purposes. The tone, the choice of words and the way the words are put together vary </span>between<span> the two styles. </span>Formal<span>language is less personal than </span>informal<span> language. It is used when writing for professional or academic purposes like university assignments.</span>
