state vs Republic of Nauru

state and Republic of Nauru both are nouns.

Word	Noun	Adjective	Verb	Adverb
state	Yes	No	Yes	No
Republic of Nauru	Yes	No	No	No

state (noun)	Republic of Nauru (noun)
the way something is with respect to its main attributes	an island republic on Nauru Island; phosphate exports support the economy
a politically organized body of people under a single government
the group of people comprising the government of a sovereign state
the territory occupied by a nation
the territory occupied by one of the constituent administrative districts of a nation
a state of depression or agitation
(chemistry) the three traditional states of matter are solids (fixed shape and volume) and liquids (fixed volume and shaped by the container) and gases (filling the container)

state (verb)	Republic of Nauru (verb)
express in words
put before
indicate through a symbol, formula, etc.