Majorly, affect is used as a verb, while the effect is used as a noun, though the effect can also be used as a noun sometimes, and effectively used as a verb, but in rare cases. When something affects another thing, it leaves an effect on it, while something has surely been affected when there is an effect on it. Sometimes also, affect is seen as a misspelling for effect. When affect comes as a noun, it indicates an emotion or feelings, while effect means the consequences or end results of a process or action.
However, when they are used as a verb, affect means to have an influence on something, while effect means to bring about as a result of something. The synonyms of effect include: to change, influence, modify, overcome, transform, take on, act on, alter, disturb, relate, etc. On the other hand, the synonyms of effect include consequence, outcome, outgrowth, reaction, aftermath, conclusion, etc.
Affect and Effect are English words with almost the same sound. As you can see, the only difference in their spelling is that, one starts with 'A' and the other start with 'E’, Although, this is not enough to differentiate between the two words, but just to tell us, they are what is responsible for the small difference in their sounds. You might have been using the two words interchangeably just because you think they are the same, but that is not true. There are some differences between ''affect and effect'‘.
Affect simply means to make a considerable change in someone or something by influencing them in some ways. For example: the story told by the boss affected me greatly. It is also used when you are moved to emotion. Effect, on the other hand, is the outcome or result of a cause. It is the action produced after someone or something has been influenced or altered by something. It is like the end result of what has affected you