Attentionally is an adverb that describes the way in which someone pays attention or focuses on something. There are several synonyms to this word, including attentively, diligently, carefully, circumspectly, cautiously, heedfully, observantly, vigilantly, watchfully, and alertly. If someone is giving their full attention to a task or activity, they are doing it attentively or diligently. Circumspectly and cautiously describe a more guarded approach to paying attention, while heedfully and observantly suggest a careful and attentive way of observing things. Being vigilant and watchful implies being alert and attentive to potential dangers or problems. Therefore, these synonyms for "attentionally" can effectively convey the degree of carefulness, focus, and observation of an individual.