There are numerous synonyms for the word "lessens," and each of them carries a slightly different nuance. For instance, terms such as "decreases," "diminishes," and "reduces" imply a gradual or incremental decline in the amount or intensity of something. On the other hand, words like "mitigates," "alleviates," and "moderates" suggest an intentional effort to soften the impact of a situation. Meanwhile, synonyms such as "abates," "eases," and "dwindles" convey a sense of easing or fading away, often in response to external forces or circumstances. Whether you choose to use "lessens" or one of its various synonyms, the ultimate goal is to convey a sense of reduction or moderation.