New England English
Eastern New England English encompasses Boston and Maine accents, and, according to some sources, the distinct Rhode Island accent. All Eastern New England English is famous for non-rhoticity, meaning it drops the "r" sound everywhere except before a vowel: thus, in words like "car", "card", "fear", and "chowder" (). The phrase "Park the car in Harvard Yard"—dialectally transcribed —is commonly used as a shibboleth, or speech indicator, for the non-rhotic Eastern New England dialect running from Boston north to Maine, and as far west as Worcester, which contrasts with the generally rhotic dialects elsewhere in North America. In all of Eastern New England, except Rhode Island, words like "caught" and "cot" are pronounced identically (both are often rounded, thus: ), because those two vowel sounds have fully merged. A phenomenon called Canadian raising occurs throughout Eastern New England, causing "writer" to have a different stressed vowel sound than "rider", and for the verb "house" to have a different vowel sound than the noun "house". and have relatively back starting positions. The "horse"–"hoarse" distinction is still present to some extent in some areas, as well as the "Mary"–"marry"–"merry" distinction in many speakers.
Rhoticity in English
American English is predominantly rhotic today, but at the end of the 1800s non-rhotic accents were common throughout much of the coastal Eastern and Southern U.S., including along the Gulf Coast. In fact, non-rhotic accents were established in all major U.S. cities along the Atlantic coast except for the Delaware Valley area centered around Philadelphia and Baltimore. During the early to mid-1900s (presumably correlated with the Second World War), rhotic accents began to gain social prestige even in the these traditionally non-rhotic areas. Thus, non-rhotic accents are increasingly perceived by Americans as sounding foreign or less educated, while rhotic accents are increasingly seen as sounding more "General American".