onfall[noun]Synonyms: attack, aggression, assailment, assault, offense, offensive, onset, onslaught
 [TahlilGaran] English Synonym Dictionary ▲
 onfall noun. 
['ɒnfɔ:l] LOE.[from ON- + FALL noun2.]1.  An attack or onset of disease, plague, or disaster. Now 
Scot. LOE.b. gen. An attack, an assault. 
E19.2.  a. A fall of rain or snow. 
Scot. E19.b. Nightfall. 
Scot. E19.  [TahlilGaran] English Dictionary ▲