ruler

Synonyms: baron baroness caesar caliph contessa count countess crowned head czar czarina dame duchess duke dynast emperor empress gerent imperator kaiser khan king lady lord magnate maharajah maharani majesty mikado mogul monarch oligarch overlord pasha potentate prince princess queen rajah rani rex royal shah sovereign sultan sultana tycoon

Antonyms: commoner subject

Synonyms: folding rule measure measuring stick rule slide rule straightedge t-square yardstick