When it comes to describing someone who is highly observant and perceptive, there are several synonyms for the phrase "most hawkeyed". These include "keen-eyed", "sharp-eyed", "eagle-eyed", "watchful", "attentive", "astute", "discerning", "perceptive", "observant", and "acutely aware". All of these words identify someone with exceptional vision or insight, and suggest their ability to notice details which others may miss. Whether it's a detective solving a case, a scientist conducting research or a journalist gathering facts, having sharp eyes and an acute ability to observe is critical for success.