Nouns

(n)particular, specifica fact about some part (as opposed to general)“he always reasons from the particular to the general”
(n)detail, particular, itema small part that can be considered separately from the whole“it was perfect in all details”
(n)particular, particular proposition(logic) a proposition that asserts something about some (but not all) members of a class

Adjectives

(s)particular, peculiar, specialunique or specific to a person or thing or category“the particular demands of the job”, “has a particular preference for Chinese art”, “a peculiar bond of sympathy between them”, “an expression peculiar to Canadians”, “rights peculiar to the rich”, “the special features of a computer”, “my own special chair”
(s)particularseparate and distinct from others of the same group or category“interested in one particular artist”, “a man who wishes to make a particular woman fall in love with him”
(s)especial, exceptional, particular, specialsurpassing what is common or usual or expected“he paid especial attention to her”, “exceptional kindness”, “a matter of particular and unusual importance”, “a special occasion”, “a special reason to confide in her”, “what's so special about the year 2000?”
(s)particular, specialfirst and most important“his special interest is music”, “she gets special (or particular) satisfaction from her volunteer work”
(s)finical, finicky, fussy, particular, pickyexacting especially about details“a finicky eater”, “fussy about clothes”, “very particular about how her food was prepared”
(s)particularproviding specific details or circumstances“a particular description of the room”