User-generated content on social websites such as Twitter
is known to be an important source of real-time information on significant events as they occur, for example natural
disasters. Our participation in the FIRE 2016 Microblog
track, seeks to exploit WordNet as an external resource
for synonym-based query expansion to support improved
matching between search topics and the target Tweet collection. The results of our participation in this task show that
this is an effective method for use with a standard BM25
based information retrieval system for this task.