Bony and lean are two separate words that describe physical characteristics of a person or an animal. While bony refers to having prominent bones that are visible, lean describes a body that is thin with low body fat. Some synonyms for bony include skinny, scrawny, gaunt, and emaciated. Alternatively, lean can be replaced with words like slender, trim, svelte, or slim. It is important to note that words like bony and lean can often have negative connotations, so it is important to use them in the appropriate context and tone. Conversely, using more positive synonyms like fit, athletic, or agile can convey similar ideas without any negative connotation.