state vs Kievan Rus'

state and Kievan Rus' both are nouns.

Word	Noun	Adjective	Verb	Adverb
state	Yes	No	Yes	No
Kievan Rus'	Yes	No	No	No

state (noun)	Kievan Rus' (noun)
the way something is with respect to its main attributes	the medieval Russian state established by Scandinavian traders in the 9th century; the capital was first in Novgorod and then in Kiev
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)	Kievan Rus' (verb)
express in words
put before
indicate through a symbol, formula, etc.