Inanely is an adverb which describes something that is dull or lacking in sense or meaning. If you want to express this idea in a more creative or varied way, there are many synonyms to choose from. For example, you could use the words vacuously, stupidly, senselessly, mindlessly, or foolishly. Alternatively, you could use other adjectives to modify the idea of inanity, such as banal, vapid, pedestrian, or trivial. Depending on the context and your desired tone, you may find that some synonyms work better than others. However, by using varied language you can avoid repetition and engage your readers with more engaging descriptions.