Which type of words can a computer not spell-check?

The correct response highlights that spell-check features in computers typically focus on identifying and correcting spelling errors based on a dictionary of standard words. Homonyms, which are words that sound alike but may have different meanings and possibly different spellings (e.g., "great" and "grate"), can be more complex for spell-checkers to handle. While the spell-check may recognize them as correctly spelled, it might not discern their intended meaning without contextual clues since spell-check primarily checks for letter arrangement rather than contextual accuracy.

For context, antonyms (words with opposite meanings), synonyms (words with similar meanings), and pseudonyms (fictitious names) don’t inherently create confusion for spell-check systems and can typically be identified and checked against standard spelling lists more easily.