1790, from synonym + -ity.

c. 1600, of words, "denoting the same idea," from Medieval Latin synonymus, from Greek synonymos, from synonymon (see synonym). Related: Synonymously.

1650s, "use of synonyms;" 1794, "quality of being synonymous," from French synonymie and directly from Late Latin synonymia, from Greek synonymos (see synonymous).

1610s, "a general view, an outline," from Late Latin synopsis "a synopsis," from Greek synopsis "a general view," literally "a seeing altogether, a seeing all at once," from syn- "together" (see syn-) + opsis "sight, appearance," from PIE root *okw- "to see."

1763, "pertaining to synopsis," from Modern Latin synopticus, from Late Latin synopsis (see synopsis). Greek synoptikos meant "taking a general or comprehensive view," and the sense "affording a general view" in English emerged by mid-19c. Specifically of the first three Gospels from 1841, on notion of "giving an account of events from the same point of view." Related Synoptical (1660s).

1756, "pertaining to the synovia," albuminous fluid secreted by certain glands, from Modern Latin sinovia (16c.), probably coined by Paracelsus and apparently an invented word. With -al (1).

1771, from Modern Latin syntacticus, from Greek syntaktikos "a joining together, a joining in order," from syntassein "put in order" (see syntax).

1570s; from Latin stem of syntax + -ical. Related: Syntactically.

1937, from French syntagmatique (de Saussure), from Greek syntagma "that which is put together in order," from syntassein (see syntax).

c. 1600, from French syntaxe (16c.) and directly from Late Latin syntaxis, from Greek syntaxis "a putting together or in order, arrangement, a grammatical construction," from stem of syntassein "put in order," from syn- "together" (see syn-) + tassein "arrange" (see tactics).