specialty vs peculiarity

specialty and peculiarity both are nouns.

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

As nouns, specialty and peculiarity are synonyms defined as:

Other synonyms of specialty include distinctiveness, speciality, specialness.

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