serious Synonyms - page 3

credible contemplative determined difficile difficult ernest epochal drastic dour disturbing disastrous dire dignified constitutive consignificant burro burdensome bookish awful austere arduous appreciable ambitious businesslike classical cogitative considerate considerable consequential conscientious concentrative concentrated complicated committed acute eventful philosophical meditative mean material major maggiore key jeopardous imposing menacing museful nasty perilous periculous