What term describes words that share the same spelling but have different pronunciations and meanings?

The correct term for words that share the same spelling but have different pronunciations and meanings is heteronyms. Heteronyms are distinctive because they are spelled identically, yet they can have completely different meanings and are pronounced differently depending on the context. For example, the word "lead" can refer to a type of metal (pronounced "led") or the act of guiding (pronounced "leed").

Homonyms, while they also involve words that sound alike or look alike, are broader and can include words that may have the same pronunciation but different meanings without the spelling being the same. Synonyms are words that have similar meanings, and antonyms are words with opposite meanings; neither of these terms relates to the concept of varying pronunciation while sharing the same spelling. Thus, heteronyms specifically captures the essence of words that share the same spelling but differ in pronunciation and meaning.