Serendipity...POSSIBLY
accidental success...a fluke.
An antonym is a word that means the opposite of another word. An antonym for "accidental" would be "intentional."
success
It means Success!
Accidental is an adjective.
The word "complexity" does not describe patterns in a poem.
The word successful is an adjective. It means to have accomplished whatever was previously proposed.
When he threw his baseball in his window, it was accidental.
it means it is the right thing
good luck, break a leg.......
profit, progress, prosperity
The word 'accidentally' is the adverb form of the adjective 'accidental'.The word 'accidental' is the adjective form of the noun accident.
Success at means the goal. Success in means the result.