Yes, ‘swim’ can be a noun.
In most contexts, ‘swim’ is commonly used as a verb, meaning to move through water by using the limbs. However, it can also function as a noun. When used as a noun, ‘swim’ refers to the act of swimming, as in the phrase ‘I went for a swim earlier today.’ In this context, it describes the event or experience of swimming, highlighting that the word has versatility in its use within the English language.