miserable vs poor

miserable is not a noun while poor is a noun.

Word	Noun	Adjective	Verb	Adverb
miserable	No	Yes	No	No
poor	Yes	Yes	No	No

As adjectives, miserable and poor are synonyms defined as:

Other synonyms of miserable include hapless, misfortunate, pathetic, piteous, pitiable, pitiful, wretched.

miserable (noun)	poor (noun)
	people without possessions or wealth (considered as a group)

miserable (adjective)	poor (adjective)
of the most contemptible kind	having little money or few possessions
of very poor quality or condition	lacking in quality or substances
contemptibly small in amount	characterized by or indicating poverty
characterized by physical misery	of insufficient quantity to meet a need
deserving or inciting pity	deserving or inciting pity
very unhappy; full of misery