| verb | be compatible, similar or consistent; coincide in their characteristics “The two stories don't agree in many details” |
| verb | be equivalent or parallel, in mathematics |
| verb | exchange messages “My Russian pen pal and I have been corresponding for several years” |
| verb | take the place of or be parallel or equivalent to “Because of the sound changes in the course of history, an 'h' in Greek stands for an 's' in Latin” |
| match | noun | an exact duplicate |
| correspondent | adjective | similar or equivalent in some respects though otherwise dissimilar |
| correspondence | noun | compatibility of observations |
| agreeable | adjective | in keeping |
| agreement | noun | compatibility of observations |
| equation | noun | a state of being essentially equal or equivalent; equally balanced |
| correspondent | noun | someone who communicates by means of letters |
| representation | noun | an activity that stands as an equivalent of something or results in an equivalent |