AזB/AצB

Here are the unique Hebrew word pairs from our conversation that follow the pattern where the first and third letters are the same, and the second letter changes from ז to צ:

lamp, flame, holy נר

   נזר (Nezer) / נצור (Natzor)
       נזר: "Crown" or "diadem," something set apart or dedicated.
       נצור: "To guard" or "to preserve."

hole חר

   חזר (Chazar) / חצר (Chatzer)
       חזר: "To return" or "to come back."
       חצר: "Courtyard" or "yard."

young bull, to quash, wild donkey, fruitful פר

   פזר (Pazar) / פצר (Patzer)
       פזר: "To scatter" or "to disperse."
       פצר: "To plead" or "to request."

son of, cereal, field, purity, neat בר

   בזר (Bazar) / בצר (Batzar)
       בזר: "To scatter" or "to sow."
       בצר: "To press," "to constrict," or "to besiege."

chief, he sang שר

   שזר (Shazar) / שצר (Shatzar)
       שזר: "To weave" or "to interlace."
       שצר: "To narrow" or "to squeeze."

hill, mountain הר

   הזר (Hazar) / הצר (Hatzar)
       הזר: "To scatter" or "to separate."
       הצר: "To narrow" or "to press."

exploring, turtledoveת, purpose of revelation תר

   תזר (Tazar) / תצר (Ttsar)
       תזר: A variant of the root "זָר," meaning "to scatter."
       תצר: "To narrow" or "to press."

bitter, myrrh, death מר

   מזר (Mazar) / מצר (Matzar)
       מזר: "To scatter" or "to sow" (less common).
       מצר: "Strait" or "narrow place," also means "a place of restriction."