A word that describes itself is called autological word or autonym (e.g., "word" is a word, "English" is an English word). The grid spanner 39A39ALike 39A, alphabetically[---------------] has struck me with the above quality so I started from it and looked for other autonyms. 18A18ALike 18A, semantically[----------] and 60A60ALike 60A, syntactically[----------] are not only symmetrical but also concern linguistics duo: semantics and syntax respectively. Hope you like clues for 25A25AWindows screens?[------], 43A43AAnd Oscar goes to... one of their spelling alphabet![----], 12D12DGreek leader of Thales?[---] and 28D28DTerminator's look-a-like?[-----]!