pitiable vs poor

pitiable is not a noun while poor is a noun.

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

As adjectives, pitiable and poor are synonyms defined as:

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

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

pitiable (adjective)	poor (adjective)
inspiring mixed contempt and pity	having little money or few possessions
deserving or inciting pity	lacking in quality or substances
	characterized by or indicating poverty
	of insufficient quantity to meet a need
	deserving or inciting pity