It is quite possible that distinct "senses" in our WSD for SMT system could be considered synonyms in a traditional WSD framework, especially in monolingual WSD.
our WSD-based lexical choice models are designed to directly model the lexical choice in the actual translation direction, and take full advantage of not residing strictly within the Bayesian sourcechannel model in order to benefit from the much richer Senseval-style feature set this facilitates.