"Synodically" Natural Recordings by Native Speakers
Relating to or arranged according to the motions of the sun, moon, and stars; specifically, concerning the periods or cycle of e.g. solar year, lunation (the period of a lunation, or new moon to old moon phases), month (as a unit of time), day, etc.
Synizesis is a literary device in which a vowel is lost in speech and becomes silent or approaches another sound in a word.
Synocha is a rare or obsolete word that refers to a sudden and violent attack of malaria, usually accompanied by fever, chills, and delirium. It was often used in the past to describe a more severe form of the disease that was prevalent in the 18th and 19th centuries.
Relating to a council or assembly that makes ecclesiastical decisions.<br><br>Example: The synodical declaration stated that the church would establish a new branch in the city.
I think you mean "synonymy".<br><br>Synonymy refers to the relationship between words or expressions that have the same or almost the same meaning. It is the practice of using words or phrases that have the same or similar meaning to convey the intended idea or concept.