Nouns

(n)asset, plusa useful or valuable quality
(n)summation, addition, plusthe arithmetic operation of summing; calculating the sum of two or more numbers“the summation of four and three gives seven”, “four plus three equals seven”

Adjectives

(a)pluson the positive side or higher end of a scale“a plus value”, “temperature of plus 5 degrees”, “a grade of C plus”
(s)plus, positiveinvolving advantage or good“a plus (or positive) factor”