Lightning
Part of speech: noun
Definition: The flash of light caused by the discharge of atmospheric electrical charge. The discharge of atmospheric electrical charge itself.
Part of speech: adjective
Definition: Extremely fast or sudden. Moving at the speed of lightning.
Part of speech: verb
Definition: To produce lightning.
Example sentence: We all know the dangers of sequels. Lightning doesn't strike twice in the same place too often, and I think you've got to move beyond it, go the extra mile and have the courage not to just repeat the first one.
Thunderbolt
Part of speech: noun
Definition: A flash of lightning accompanied by a crash of thunder.An event that is terrible, horrific or unexpected.