Proper nounA proper noun is a noun that identifies a single entity and is used to refer to that entity (Africa, Jupiter, Sarah, Tesla, Inc.) as distinguished from a common noun, which is a noun that refers to a class of entities (continent, planet, person, corporation) and may be used when referring to instances of a specific class (a continent, another planet, these persons, our corporation). Some proper nouns occur in plural form (optionally or exclusively), and then they refer to groups of entities considered as unique (the Hendersons, the Everglades, the Azores, the Pleiades).
Long sThe long s , also known as the medial s or initial s, is an archaic form of the lowercase letter . It replaced the single s, or one or both of the letters s in a "double s" sequence (e.g., "sinfulness" for "sinfulness" and "possess" or "possess" for "possess", but never *"possess"). The modern letterform is known as the "short", "terminal", or "round" s. In typography, it is known as a type of swash letter, commonly referred to as a "swash s".
Orthographic depthThe orthographic depth of an alphabetic orthography indicates the degree to which a written language deviates from simple one-to-one letter–phoneme correspondence. It depends on how easy it is to predict the pronunciation of a word based on its spelling: shallow orthographies are easy to pronounce based on the written word, and deep orthographies are difficult to pronounce based on how they are written. In shallow orthographies, the spelling-sound correspondence is direct: from the rules of pronunciation, one is able to pronounce the word correctly.
