Wellwiller is a word that is used to describe someone who has positive intentions towards others. There are many synonyms for wellwiller, including benefactor, supporter, advocate, champion, enthusiast, custodian, protector, and ally. A benefactor is someone who provides support or assistance to others, while a supporter is someone who encourages and helps others in their endeavors. An advocate is someone who supports or defends a person or a cause, while a champion is someone who fights for the success of others. An enthusiast is someone who is passionate about a particular activity or idea, while a custodian protects and cares for something. A protector shields others from harm, and an ally is someone who supports or sides with others in a dispute.