Some common synonyms for "however" are: nevertheless, nonetheless, yet, though, although, notwithstanding, still, even so, in spite of that, despite that, just the same, be that as it may, albeit, on the other hand, and although. These synonyms are used to express contrast or opposition with a previously introduced idea. Different synonyms may require slight sentence rewrites depending on the context, but they generally convey a similar meaning to "however".