In the word conservation, there is a minor stress on con, and a major stress on va.
va
The stressed syllable in the word "persistence" is "sis."
The stressed syllable in the word "colorful" is the first syllable, "col."
The stressed syllable in the word "semester" is the second syllable, "mes."
The first syllable "resi-" is stressed in the word "residence."
No, "rejoiced" is not a word with a stressed syllable. The stress falls on the second syllable, "joiced."
I think it depends on how you say it.
The stressed syllable in the word "wonderful" is the first syllable: "won-".
The stressed syllable in the word "victory" is the first syllable, "vic."
The stressed syllable in the word "burglary" is the first syllable, "burg."
The stressed syllable in the word "boundary" is "bound."
The stressed syllable in the word "contentment" is the second syllable, "tent."