Here are some options, with varying degrees of poetic flair:
Direct Replacements:
* Ere: This is an archaic word for "before" with a distinctly poetic feel, especially in formal or elevated language.
* Prior: More formal and less poetic than "ere," but still works well in some situations.
More Poetic Options:
* Erstwhile: This word implies a past state or condition, suggesting a change over time.
* Hitherto: This word suggests a period of time leading up to the present moment.
* Aforetime: This is a more archaic and evocative term for "before," implying a distant past.
* Of yore: This phrase suggests a time long ago, often with a nostalgic or romantic feel.
* In days of old: Similar to "of yore," but more specific to a particular historical period.
Figurative Language:
* Preceding: Less poetic but can be used with other poetic devices for emphasis.
* In the twilight of: Can be used to suggest a time approaching an end.
* At the dawn of: Can be used to suggest a time of beginnings.
Ultimately, the best word to use depends on the specific context of your poem and the tone you want to create. Consider the specific meaning you want to convey and the overall effect you're trying to achieve.