For a syndicator to be approved by the BHA they must themselves be registered as a sole or company owner. SYNDICATE MEMBERS: Any person who has shares in the ownership, or lease, of racehorses through a syndicate should be listed a syndicate member.
Horse Racing Syndicates: How to Share Costs and Own a Racehorse Keep the partnership simple and get everything in writing. Find a horse you like and a great veterinarian you trust. Decide how many shares will be offered in a horse. Choose your trainer wisely. Map out a plan and consult with your partners and trainer.
Clubs tend to be open where anyone can join - you effectively share the costs and fish from there. There can be limits on numbers, but mostly not. Syndicates tend to be limited numbers of places to fish 'special' venues usually containing some very big fish.
The Merriam Webster Dictionary defines syndicate as a group of people or businesses that work together as a team. This may be a council or body or association of people or an association of concerns, officially authorized to undertake a duty or negotiate business with an office or jurisdiction.