"Drearier" is an adjective used to describe something that is gloomy, dull, or lacking in vibrancy. When trying to convey a similar meaning, several synonyms can aptly replace "drearier". For instance, "bleak" paints an image of desolation and emptiness, while "dreary" itself provides an alternative to the word in question. "Drab" evokes a sense of colorlessness or monotony, while "gloomy" carries a connotation of darkness and sadness. Similarly, "sombre" suggests a mournful atmosphere. Additionally, "drearisome" captures the essence of monotony, while "lackluster" signifies a lack of liveliness or excitement. All these synonyms cater to different shades of meaning, offering flexibility in conveying the intended sentiment.