compulsion[noun]Synonyms:- urge, drive, necessity, need, obsession, preoccupation
- force, coercion, constraint, demand, duress, obligation, pressure, urgency 
Contrasted words: coaxing, inducing, persuasion, choice, election, option, preference
Related Words: driving, 
impelling, 
pressing, 
exigency, 
necessity, 
need, 
pressure, 
stress [TahlilGaran] English Synonym Dictionary ▲
 com‧pul‧sion /kəmˈpʌlʃ
ən/ 
 noun[
Date: 1300-1400; 
Language: Old French; 
Origin: Late Latin compulsio, from Latin compellere;  ⇒ compel]
1.  [countable] a strong and unreasonable desire to do something ⇒ 
compel: 
 The desire to laugh became a compulsion.compulsion to do something
 Leith felt an overwhelming compulsion to tell him the truth.
 the compulsion to smoke or eat too much2.  [singular, uncountable] the act of forcing or influencing someone to do something they do not want to do ⇒ 
compelunder (no) compulsion to do something
 Owners are under no compulsion to sell their land.
 The use of compulsion in psychiatric care cannot be justified.  [TahlilGaran] Dictionary of Contemporary English ▲