Fibster, the word that means someone who tells lies, can be a little bit harsh. Hence, many people look for alternative and more euphemistic terms to describe such individuals. Some of the synonyms that can be used for fibster include story-teller, fabricator, misleader, deceiver, liar, prevaricator, and falsifier. These words can be used as a replacement for fibster in different contexts. For example, a story-teller can be a person who spins a tall tale without any malicious intent, whereas a deceiver can suggest someone who is intentionally trying to deceive and hurt others. Ultimately, it's up to the individual to decide which synonym best suits the situation and tone they wish to convey.