thun·der 
(thŭndər)
(thŭndər)n.
1. The crashing or booming sound produced by rapidly expanding air along the path of the electrical discharge of lightning.
2. A sound that resembles or suggests thunder.
v. thun·dered, thun·der·ing, thun·ders
v.intr.
1. To produce thunder.
2. To produce sounds like thunder.
3. To move while making a loud noise: The express train thundered past us.
4. To utter loud, vociferous remarks or threats.
v.tr.
To express violently, commandingly, or angrily; roar.
[Middle English thonder, from Old English thunor; see (s)tenə- in the Appendix of Indo-European roots.]
thunder·er n.