* No definitive list: There isn't a complete and official list of all compound words in the English language. New ones are constantly being created.
* Stress variation: The stress pattern in a compound word can change depending on context, meaning, and regional dialect. Some words have multiple possible pronunciations.
* Subjectivity: What constitutes a "compound word" itself can be debated. Some words are clearly compounds (e.g., "sunrise"), while others are more debatable (e.g., "blackboard").
However, here are some insights into compound words and stress:
* Most compound words have stress on the first element: Think of words like "blackbird," "headache," and "rainbow."
* Some have stress on the second element: This often happens when the first element is more like a modifier (e.g., "overcoat," "downstairs").
* Stress can shift depending on meaning: "Present" as a noun is stressed on the first syllable ("PRE-sent"), but as a verb, it's on the second ("pre-SENT").
In conclusion, you can't get a precise number. Instead, it's better to understand the general principles of stress in compound words and how it can vary.