To conceive of any phenomena as existing that then goes out of existence is annihilation. To conceive of any sustaining entity or quality"nomena" is eternalist. This is how I understand it. So it would not be ultimately correct to say that there is suffering which comes to an end. It is only a matter of skillful means.
"Beautifully taught is the Lord's Dhamma, immediately apparent, timeless, of the nature of a personal invitation, progressive, to be attained by the wise, each for himself." Anguttara Nikaya V.332