The phrase "appear as" can be substituted with a variety of synonyms depending on the desired context. Some alternative expressions include "seem like," "come across as," "look like," "present as," and "manifest as." Each of these words has a slightly different connotation and can affect the tone of a sentence. For example, saying "he seemed like a trustworthy guy" implies a level of uncertainty, while "he presented as a reliable source" carries a more formal and authoritative tone. Choosing the right synonym for "appear as" is essential in communicating the desired message clearly and effectively.