Antonyms for the word "subsequent" include words like "preceding," "previous," "prior," and "former." Each of these words carries the opposite meaning of subsequent, which refers to something that comes after or follows another event or occurrence. For instance, "preceding" refers to something that comes before, while "previous" means occurring before in time or order. "Prior" is a synonym for "preceding," while "former" refers to something that occurred in the past. Overall, these antonyms highlight the importance of context and help to clarify the meaning of "subsequent" by providing related words with different meanings.