The phrase "is aware" can be replaced with a variety of synonyms to add nuance and specificity to one's writing or speech. Some good alternatives include "knows," "realizes," "understands," "appreciates," "recognizes," and "comprehends." Each of these words offers a slightly different shade of meaning, conveying degrees of consciousness, insight, and perception. For example, "knows" might suggest a basic familiarity with a fact or concept, while "appreciates" connotes a deeper understanding and valuation. Similarly, "realizes" might emphasize a sudden or gradual recognition of something previously unnoticed or unacknowledged, while "comprehends" can suggest a comprehensive, system-wide grasp of something complex or abstract.