English Synonyms Practice Test 12

Sullen : bad-tempered and sulky.
Dullness : lack of interest or excitement.
Sordid : involving immoral or dishonourable actions and motives; arousing moral distaste and contempt.
Sharpness : the quality or state of being sharp.
Acuity : sharpness or keenness of thought, vision, or hearing.

Synonym of Acuity is Sharpness