The word important can have the synonyms crucial, vital, valuable, significant, or substantial.
Luminary and leader are synonyms for very important person. They begin with the letter l.
responsible
Synonyms are important so that you do not keep using the same words over and over again.
majorconsequentialeventfulmomentoussignificantsubstantialweightymeaningfulbigurgentvital
important significant
very happy
Strong Synonyms: Critical, Mandatory Weak Synonym: Important
Some synonyms of "ok" are:alright, fine, very well, righty-ho
Very, thoroughly, really.
Very well
No, they are not synonyms.