What is another word for welcher?
Pronunciation: [wˈɛlt͡ʃə] (IPA) 
The word "welcher" refers to someone who fails to uphold their commitments or reneges on a deal. There are several synonyms that can be used in its place, such as a swindler, defrauder, cheat, scammer, or fraudster. All of these terms describe someone who is dishonest and deceptive when it comes to fulfilling their obligations. Other potential synonyms include a weasel, con artist, or trickster. Regardless of which term is used, the message remains the same: Welchers behave unethically, are untrustworthy, and cannot be relied upon to follow through on their promises.
