Hammersmith is a proper noun that refers to a district in West London. However, there are several synonyms that can be used to describe this area. One option is "Hammersmith and Fulham", which is the name of the borough that Hammersmith belongs to. Another synonym is "Hammerstein" which is a variant of the name Hammersmith. Additionally, "Wycombe" is another synonym, as there is a road in Hammersmith called Wycombe Road. In terms of its location, synonyms for Hammersmith may include "West London", "Inner London", or "the Thames Valley". Whatever synonym is used, it is clear that Hammersmith is a vibrant and important part of London's cultural and commercial landscape.