Root ش ي خ($ y x) has 3 unique word forms and appears 4 times in the Quran.

Word Translation Occurrences
شَيۡخٞ (is) a very old man 2
شَيۡخًاۖ (is) an old man 2
شَيۡخٗا old 2
شُيُوخٗاۚ old 2