Why would u ask this question? No one is going to know what the answer is.
compact
agreement, conformity
concluded
Agreeable
concensus
To reach an agreement; to be in harmony with one another.
You may use the following synonym of the word 'agreement': understanding, deal, arrangement, pact, contract.
Agreement.
arrangement
Another word for the adjective congruent is agreeable. Additional synonyms for the word congruent are harmonious, coinciding, compatible, and in agreement.
There are a few words that can be used, but the best would be Agreement... Others are as followed... Compact, Concordant, Bargain, Pledge, Alliance or Entente... Of course, there are more, but those fit perfectly.
The root for 'subscription' is 'subscribe'.