The words ''Do'' and ''Does'' are English words. There is no big difference between them because, in terms of interpretation, they are both the same, but they are used very differently. In addition, both words are verbs.
The word 'Do' means to perform something; in other words, it means to act. For example, I'm going to do the assignment later in the day. The verb 'Do,' according to the rules that guide its usage, should be used with a plural noun or pronoun. For example:
Do Paul and John know that we are submitting the assignment by the afternoon? The word 'Does,' on the other hand, has almost all the same meaning as 'Do' but there are exceptions to how it can be used. The word 'Does' is a singular verb which should go together with a singular noun or pronoun. For example, She does know the exam is starting in the next two hours. Another thing to know about the usage of the word 'Does' is that it is used for a third-person singular pronoun.