A profusion is a very large amount of something, often spread out so you can see how rich it is. A profusion of flowers in spring. A profusion of colours. A profusion of choices on the menu. It often sounds plentiful, even pleasant — not dangerous. Compare that with profuse bleeding, which is worrying: same family, different feeling. You will also see in profusion: roses grew in profusion. It is a written, slightly fancy noun. Speakers say a lot of, loads of, or so many. Though actually, the tidy idea ‘a very large amount’ is right, but the word likes things you can look at or choose from — flowers, colours, food — more than abstract work or money.