A reassessment is the careful second look itself — the act of thinking about something again so you can decide whether to keep your old judgment or change it. It is the noun that matches the verb reassess. After a reassessment, the opinion may stay the same, or it may not; the word names the new judging, not the result. Though actually, in some places reassessment also means a new official judgment of how much tax a house should pay. That is still the same idea — judging the value again — just used in a government office. In school and work, a reassessment is often a second look at a grade, a plan, or a risk. The word is formal. Students sometimes write reassess when they need this noun: you reassess (verb); what you carry out, or what you get, is a reassessment.