• 童顔どうがん — baby face / youthful face
• 顔料がんりょう — pigment
• 洗顔せんがん — face washing
• 顔役かおやく — influential figure / local notable
• 顔色かおいろ — complexion / expression
• 笑顔えがお — smiling face
• 顔面がんめん — face (anatomical / formal)

顔 is used not only for the physical face, but also for expression, reputation, and “who someone is” in a social sense. You’ll often see it in everyday phrases about mood (顔色), smiles (笑顔), and even influence (顔役).