N for n
The 'catalyst' and 'death knell' group
These nouns refer to things that cause something to begin or come into being, or to come to an end.
But is hot weather really the catalyst for unsocial behaviour?
The clampdown on drink-driving has sounded the death knell for many isolated country pubs.
With most of these nouns, the preposition for is sometimes followed by an '-ing' clause.
breeding ground catalyst cue death knell graveyard ground impetus kiss of death seedbed signal springboard starting point trigger
That was the springboard for jumping into the restaurant business.