I think it has to be SUBMIT.

The word for thinking only about oneself and not others is "selfishness." It refers to a lack of consideration for the needs and feelings of others.

Perhaps you are thinking of the word summary. See the related question.

The word 'decision' is a singular, common, abstract noun; a word for the process of resolving a question or making a choice; a conclusion or resolution reached after consideration; a formal judgment; a word for a thing.

Yes, the word judgement is an abstract noun; a word for an opinion or decision made after thinking carefully about something.