proponent
One who champions
A proponent is someone who advocates for or supports something—an idea, cause, policy, or course of action: proponents of gun control, proponents of the bill.
The word implies active championing rather than passive agreement.
The opposite is opponent.
Public cause supporter
- supporterOne who backs another
- backerFinancial supporter
- championTop competitor, or advocate
- defenderOne who guards another
promoter · upholder · spokesman · spokesperson · apologist · endorser · booster · pleader
One who supports another
- adherentLoyal supporter of something
- devoteeZealous admirer or follower
- discipleCommitted follower of teaching
- believerOne who accepts something
sympathizer · convert · loyalist · fan · apostle · votary · partisan · ideologue
One who publicly approves
- signatoryOne who signs officially
- ratifierOne who formally approves
- guarantorOne pledging another's obligation
- sponsorFunder of activities
underwriter · backer · certifier · validator · subscriber · witness · cosigner · supporter
Vigorous cause champion
- campaignerOne who advocates publicly
- reformerAgent of institutional improvement
- crusaderZealous advocate for change
- lobbyistPaid legislative influencer
organizer · agitator · demonstrator · protestor · advocate · revolutionary · radical · dissident
Systematic reasoning process
- rhetoricArt of persuasive language
- advocacyPleading for a cause
- lobbyingAdvocating to decision-makers
- promotionRank increase or publicity
campaigning · discourse · debate · eloquence · influence · propaganda · persuasion · negotiation
advocate
Public cause supporter
defender · promoter · upholder · spokesman · spokesperson · apologist · endorser · booster · pleader · vindicator
follower
One who supports another
- adherentLoyal supporter of something
- devoteeZealous admirer or follower
- discipleCommitted follower of teaching
believer · sympathizer · convert · loyalist · fan · apostle · votary · partisan · ideologue · sectary
endorser
One who publicly approves
- signatoryOne who signs officially
- ratifierOne who formally approves
- guarantorOne pledging another's obligation
sponsor · underwriter · backer · certifier · validator · subscriber · witness · cosigner · supporter · benefactor
activist
Vigorous cause champion
- campaignerOne who advocates publicly
- reformerAgent of institutional improvement
- crusaderZealous advocate for change
lobbyist · organizer · agitator · demonstrator · protestor · advocate · revolutionary · radical · dissident · environmentalist
argumentation
Systematic reasoning process
promotion · campaigning · discourse · debate · eloquence · influence · propaganda · persuasion · negotiation · dialogue