governor vs nabob

governor and nabob both are nouns.

Word	Noun	Adjective	Verb	Adverb
governor	Yes	No	No	No
nabob	Yes	No	No	No

As nouns, nabob is a hyponym of governor; that is, nabob is a word with a more specific, narrower meaning than governor:

Other hyponyms of governor include bey, eparch, governor general, military governor, nawab, proconsul, satrap, vicereine, viceroy.

governor (noun)	nabob (noun)
a control that maintains a steady speed in a machine (as by controlling the supply of fuel)	a wealthy man (especially one who made his fortune in the Orient)
the head of a state government	a governor in India during the Mogul empire