13-Letter Words Containing: I,I,O,S,T

• to believe especially on uncertain or tentative grounds

• the mathematical process of finding the maximum value of a function

• the act of raising to the highest possible point or condition or position

• change from a simple vowel to a diphthong

• the act of making equal or uniform

• the act of dividing into quanta or expressing in terms of quantum theory

• construe as a real existence, of a conceptual entity

• To perform a vasectomy