My co-workers tend to think that it is better to limit non-domain type suffixes to a small fixed set of OOP-pattern inspired words, e.g.:

• *Service
• *Repository
• *Factory
• *Manager
• *Provider

I believe there is no reason to not extend that set with more names, e.g. (some "translation" to the previous vocabulary is given in brackets):

• *Distributor (=> *DistributionManager or *SendingService)
• *Generator
• *Browser (=> *ReadonlyRepositoryService)
• *Processor
• *Manipulator (=> *StateMachineManager)
• *Enricher (=> *EnrichmentService)

(*) denotes some domain word, e.g. "Order", "Student", "Item" etc.

The domain is probably not complex enough to use specialized approaches such as DDD which could drive the naming.