tremendous - This cake is tremendous!
echoes - There were echos in the cave.
photograph- There was a photograph in the paper of the thunder.
sensor- The submarines have detected the mines.
scientist - The scientist has discovered why there are stars.
lightening- The streets are getting less dark.
especially- The guy wants all the work done especially the rough copy.
flickering - The lights keep flickering in the building.
explosion- there was a big explosion at the construction site.
static- There was static on the tv.