Warrantability refers to the quality of being able to be guaranteed or warranted. There are several synonyms for this word, including justifiability, defensibility, and validity. Justifiability refers to the ability of a claim or action to be justified, while defensibility denotes the capacity to be defended against objections or criticism. Validity refers to the extent to which something is supported by evidence or logic. Other synonyms for warrantability include legitimacy, credibility, and supportability. These words all convey a similar meaning, and indicate the degree to which something can be relied on or trusted.