There are several synonyms for the word "regards" that can be used to end a letter or email on a positive note. Some common alternatives include "best wishes," "warm regards," "kind regards," "yours truly," and "cordially." Each of these phrases can be used interchangeably depending on the level of formality and personal connection with the recipient. Other less formal options include "cheers," "take care," and "all the best." Using a synonym for "regards" can help to convey a sense of warmth and personal connection, while also showing professionalism and respect for the recipient.