How to confirm that a more frequently labelled object is a better instance of the label
You could possibly use a two-proportion z-test to test against the null hypothesis that $(x_{1}/n_{1}-x_{2}/n_{2})==0$, though there may be better methods that consider the overall distribution of words chosen and accounting for differences in raters in terms of how many words they choose (your situation does not fit the assumptions of the test but may be 'close enough' for certain purposes).