While the most classic examples of onomatopoeia are words such as "bang" or "woof," in which an individual word sounds like the concept it signifies, we can also see onomatopoeia in individual sounds. In the case of "Annabel Lee," we can think about how Poe uses sounds in the text to call to mind the constant crash of the waves and the hiss of the wind. We can hear a bit of the wind in "chilling and killing" at the end of the forth stanza. Similarly, the head rhyme in the last two lines of "sepulchre ... sea / ... sounding sea" suggests again the sounds of the wind and the crash of the waves. You can also look at the s's and v's in "Can ever dissever my soul from the soul," as well as the effect of the v's, th's, and the s in "But we loved with a love that was more than love" and other lines.