comparison in WordNet English dictionary

1. qualities that are comparable
   "no comparison between the two books"; "beyond compare"
   comparison  compare  equivalence  comparability 
   
2. the act of examining resemblances
   "they made a comparison of noise levels"; "the fractions selected for comparison must require pupils to consider both numerator and denominator"
   comparison  comparing 
   
3. relation based on similarities and differences
   comparison