I. ||necessary noun
Synonyms: privy 1, backhouse, ||biffy, ||closet, *crapper, jakes, ||office, outhouse
II. necessary adjective
1.
Synonyms: essential 4, imperative, indispensable, necessitous, prerequisite
Related Word: compelling, compulsory, constraining, mandatory, obligatory; important, momentous, significant; cardinal, fundamental
Contrasted words: insignificant, unessential, unimportant
Antonyms: unnecessary
2.
Synonyms: inevitable , certain, ineluctable, ineludible, inescapable, inevasible, returnless, unavoidable, unescapable, unevadable
Related Word: inerrable, inerrant, infallible, unerring