The word "Thrasonical" is an adjective that describes someone who boasts or brags excessively. Some synonyms for this term include vainglorious, bombastic, grandiloquent, pompous, boastful, and arrogant. If someone is being thrasonical, they are often exaggerating their accomplishments or qualities in an attempt to impress others. Other synonyms that may be used in this context include egotistical, narcissistic, self-important, and conceited. It is important to recognize when someone is being thrasonical and to approach them with caution, as their behavior may be indicative of deeper insecurities or issues.