come / cum are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
come: (verb) move toward, travel toward something or somebody or approach something or somebody. (verb) come to pass; arrive, as in due course. (verb) reach or enter a state, relation, condition, use, or position. (verb) to be the product or result. (verb) be found or available. (verb) extend or reach. (verb) exist or occur in a certain point in a series. (verb) cover a certain distance. (verb) happen as a result. (verb) develop into. (verb) be received. (verb) experience orgasm. (verb) have a certain priority.
cum: NA
come: k·AH·m
cum: k·AH·m
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)