From Longman Dictionary of Contemporary Englishdownsidedown‧side /ˈdaʊnsaɪd/ noun → the downside
Examples from the Corpus
downside• No one could contemplate fame these days without knowing beforehand of its downside.• Most comfort eaters enjoy it while they're eating, but the downside is they soon start to pile on the pounds.• And it is wise to consider the downside as well as the upside of locating your business in your home.• On the downside, all say the slowing national economy will hinder Texas growth.• The downside is that it can be obtained only through brokers and financial advisers.• The downside to this is that they lose valuable advertising space on television programmes such as Saturday Superstore. 