In ancient Egypt, the Sphinx is a male statue of a lion with the head of a human, sometimes with wings. Most sphinxes however represent a king in his appearance as the sun god.
An anacronym is an acronym or an abbreviation so old or familiar that no one remembers what its letters stand for, such as BASIC or COBOL . By the way, an acronym is not just any abbreviation. It's a word that is short for other words, usually using their initial letters.
In linguistics, a hyponym is a word or phrase whose semantic field is included within that of another word, its hyperonym or hypernym. In simpler terms, a hyponym is in a type-of relationship with its hypernym. For example, pigeon, crow, eagle and seagull are all hyponyms of bird; which, in turn, is a hyponym of animal.