The abstract noun of the river is "the Mississippi River".
Amazonius Riverus
The word river is a common noun; that means that it is a word for any river, any river at all.A common noun becomes a proper noun when it is the name of a person, place, thing, or a title; for example:'The River of No Return' (1954), Marilyn Monroe and Robert MitchumMississippi River, Amazon River, Nile River, Yangtze River, etc.White River Junction, VermontThe River Cafe in New York City, London, Puerto Vallarta, or Calgary
Yes, the noun astonishment is an abstract noun, a word for an emotional reaction.
Is undergone an abstract noun
Concrete noun
The abstract noun is criticism.
The noun 'hopefulness' is an abstract noun, a word for an emotion.
The abstract noun is obligation.
Abstract noun of hopeless
Friendship has not abstract noun because It is a abstract noun
The abstract noun form is tourism.
The abstract noun for the adjective vacant is vacantness. Another abstract noun form is vacancy.