The phrase "scot and lot" is an archaic term that refers to the obligation of an individual or household to pay taxes to the government. However, there are many modern-day synonyms that can be used instead. Some of these synonyms include "levy," "impost," "assessment," "taxation," "duty," and "tribute." Each of these words carries a slightly different connotation, so it is important to choose the right synonym for the context. For example, "duty" might be a better choice if you are talking about a patriotic obligation to pay taxes, while "impost" might be a better choice if you are discussing an unpopular or unjust tax.