fact vs particular

fact and particular both are nouns.

Word	Noun	Adjective	Verb	Adverb
fact	Yes	No	No	No
particular	Yes	Yes	No	No

As nouns, particular is a hyponym of fact; that is, particular is a word with a more specific, narrower meaning than fact:

fact: a piece of information about circumstances that exist or events that have occurred
particular: a fact about some part (as opposed to general)

Other hyponyms of fact include case, detail, item, point, specific, general, matter of fact, observation, reason, score, truth.

fact (noun)	particular (noun)
a piece of information about circumstances that exist or events that have occurred	a fact about some part (as opposed to general)
a concept whose truth can be proved	(logic) a proposition that asserts something about some (but not all) members of a class
a statement or assertion of verified information about something that is the case or has happened	a small part that can be considered separately from the whole
an event known to have happened or something known to have existed

fact (adjective)	particular (adjective)
	providing specific details or circumstances
	exacting especially about details
	first and most important
	unique or specific to a person or thing or category
	surpassing what is common or usual or expected
	separate and distinct from others of the same group or category