speciality vs plus

speciality and plus both are nouns.

Word	Noun	Adjective	Verb	Adverb
speciality	Yes	No	No	No
plus	Yes	Yes	No	No

As nouns, plus is a hypernym of speciality; that is, plus is a word with a broader meaning than speciality:

Other hypernyms of speciality include asset.

speciality (noun)	plus (noun)
the special line of work you have adopted as your career	the arithmetic operation of summing; calculating the sum of two or more numbers
a distinguishing trait	a useful or valuable quality
an asset of special worth or utility

speciality (adjective)	plus (adjective)
	on the positive side or higher end of a scale
	involving advantage or good