The phrase 'less good' implies subpar quality and inadequacy. As such, it is useful to have alternative words to describe something that isn't the best. Some common synonyms include substandard, mediocre, inferior, unsatisfactory, deficient, and poor-quality. Additionally, phrases like not up to standard, below par, and not top-notch all mean the same thing. When describing something that is not as good as it should be, it is important to be clear and concise in your choice of words. By using these synonyms, you can differentiate between items of varying quality and convey your meaning effectively.