Proponent is an adjective that qualifies the action of the individual who presents a proposal, or something that aims to propose something.
The term “proponent” is commonly used to identify the author of an official contract or proposal, that is, the person who had the idea to produce it.
Etymologically, the term "proponent" is originated from the Latin proposes, in propose, which can be literally translated as “put on” or “expose to view”.
the main synonyms for bidder they are: policitante, proponent and proponent.
Bidder and Promiser
As said, proponent is one who proposes something, while promising it's relative the one who makes a promise to someone, mainly in the legal field.
The so-called “Promissing Law” consists of the purchase and sale commitment signed between two parties.
Proponent and oblate
In an official context, the proponent is the author of a proposal, while the oblate is the term given to the individual the proposal is targeted.
The figure of the oblate, as well as the proponent, is defined by article 427 of the Civil Code of 2002.
The oblate may or may not accept the proposal presented to him by the proponent. This term is synonymous with adherent or acceptor.