The term "fly hawk" refers to a person who has exceptional attention to detail or is able to detect even the smallest of errors or flaws. Synonyms for fly hawk include eagle-eyed, sharp-eyed, keen-sighted, observant, vigilant, discerning, perceptive, and astute. These words all describe a person who is highly attentive and able to notice details quickly and accurately. Other related words that may be used as synonyms for fly hawk are scrutinizing, examining, studying, analyzing, investigating, and inspecting. When looking for a word to describe someone who is able to identify even the tiniest mistakes, any of these synonyms for fly hawk would be a great choice.