"nuts" are called 견과류 collectively, but that's a relatively formal word. More commonly, we use the specific names like 밤(chestnut), 잣(pine nut), 호두(walnut), 알몬드(almond) and so on. So "I like to eat noodles with nuts" may be said like: 1. 난 견과류를 넣은 국수를 (먹기) 좋아한다. 2. 난 잣/호두를 넣은 국수를 (먹기) 좋아한다. 3. 난 국수에 견과류[잣, 호두]를 넣어서 먹기를 좋아한다. (Sentence-3 is slightly different, like "I like to eat noodles with nuts added in")