Synonyms and related words :
according to Hoyle, appropriate, atrocious, awful, becoming, correct, decent, decorous, deserved, dreadful, due, fair, fit, fitting, good, grim, horrible, just, kosher, merited, nice, normal, normative, proper, requisite, right, right and proper, righteous, rightful, rigorous, seemly, stern, strict, stringent, suitable