Is undoubtably a word?
“Undoubtably” is not listed as a word in dictionaries of modern English.
While many people use the word “undoubtably” to mean undoubtedly, this is considered nonstandard usage (i.e., a mistake).
It is therefore best to avoid using “undoubtably” in formal and academic writing.
The QuillBot Grammar Checker can help ensure your writing is error-free.