agent

Agent is a coordinate term of obligator.

As nouns the difference between agent and obligator

is that agent is agent (intermediary for certain services, such as for artistic performances or public relations) while obligator is (legal) one who establishes an obligation under law.

As nouns the difference between agent and convulsant

is that agent is agent (intermediary for certain services, such as for artistic performances or public relations) while convulsant is an agent, such as a drug, that causes convulsions; a convulsant agent.

As an adjective convulsant is

causing or producing convulsions; convulsive.

As nouns the difference between agent and obscurant

is that agent is agent (intermediary for certain services, such as for artistic performances or public relations) while obscurant is one who acts to confound or obfuscate; an obscurantist.

As an adjective obscurant is

acting or tending to confound, obfuscate, or obscure.

As nouns the difference between agent and calefacient

is that agent is agent (intermediary for certain services, such as for artistic performances or public relations) while calefacient is (obsolete) a medical agent or substance which produces a feeling of warmth when applied to the body.

As an adjective calefacient is

(obsolete) having heating or warming effects.