Iterate is to state something clearly. To reiterate is to repeat something. That’s what I think. I think the two are different and should not be used interchangeably.

On paper they might have similar meaning but nowadays there is a clear difference in usage between the two. You would use them in different contexts. To iterate means to do or say something for the second or more times ( repeat). It is an obsolete word now but when used it is mostly for actions, procedures . They will iterate the steps until they find the solution I asked him to iterate ( say again) his advice. We will iterate this procedure until we see the flashing light. Reiterate as a word has gained a momentum recently. It’s a broadly used synonym but you wouldn’t use it in the examples above. To reiterate means ( mostly) to say something again ( iterate) for emphasis. You stressfully iterate. Other synonyms: emphasise, reemphasise, stress, restate, repeat) Ok, it’s like talking to the wall. Let me reiterate. I don’t want to attend his wedding. I really felt I had to reiterate my point that if they don’t practice, they will fail the exam. The politician wanted to reiterate the key point of protecting the environment. I reiterate ( repeat) , don’t come here in shoes! In academic essays reiterate is used frequently as it sounds ‘ smarter’ . ‘I would like to reiterate the importance of protecting the environment’ *Iteration has an additional popular meaning in computer science ( repeating steps/ instructions) and mathematic ( repeating functions by using the output of one step as the input of the internation)

They actually have overlapping meanings, and mean almost exactly the same thing lol. You will see reiterate used a lot more though 😂