pathetic vs poor

pathetic is not a noun while poor is a noun.

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

As adjectives, pathetic and poor are synonyms defined as:

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

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

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