There are several synonyms for the phrase "door-to-door" including direct-to-consumer, home-to-home, customer-to-customer, and house-to-house. These phrases describe a marketing or sales approach where representatives or salespeople physically go to individual homes or businesses to sell products or services. This approach can be effective for companies looking to establish personal relationships with their customers and get a better understanding of their needs. Door-to-door sales can be a challenging job, but the potential to build trust and establish loyalty can lead to long-term success. Overall, alternative phrases for "door-to-door" focus on the direct and personal nature of this type of sales approach.