Meaning : Be compatible, similar or consistent. Coincide in their characteristics.
Example :
The two stories don't agree in many details.
The handwriting checks with the signature on the check.
The suspect's fingerprints don't match those on the gun.
Meaning : Be equivalent or parallel, in mathematics.
Synonyms : equate
Meaning : Exchange messages.
Example :
My Russian pen pal and I have been corresponding for several years.