peculiarity vs specialty

peculiarity and specialty both are nouns.

Word	Noun	Adjective	Verb	Adverb
peculiarity	Yes	No	No	No
specialty	Yes	No	No	No

As nouns, peculiarity and specialty are synonyms defined as:

Other synonyms of peculiarity include distinctiveness, speciality, specialness.

peculiarity (noun)	specialty (noun)
something unusual -- perhaps worthy of collecting	the special line of work you have adopted as your career
a distinguishing trait	a distinguishing trait
an odd or unusual characteristic	an asset of special worth or utility