A computer-implemented method for dynamically generating a speech recognition grammar is provided. The method includes determining a target entry, and accessing a plurality of potential distracters. The method also includes selecting one or more distracters from the plurality of potential distracters. More particularly, each potential distracter selected is selected based upon an assessed acoustic dissimilarity between the distracter and the target entry. The method further includes dynamically generating a speech recognition grammar that includes the target entry and one or more of the distracters selected based upon an acoustic dissimilarity to the target entry.