► luckyhaving good luck:  We got lucky and won a few races  (=won the races because we were lucky). William considered himself lucky to have married Leonora.
► fortunate fortunate means the same as lucky but sounds more formal:  It was fortunate that no one was injured in the accident.
► fortuitous formal lucky and happening by chance:  When he was cleaning out his laboratory, he made a fortuitous discovery.
► miraculous extremely lucky, especially because you avoid having something bad happen to you:  The woman had a miraculous escape after her car overturned on the freeway.
► auspicious formal an auspicious moment or start makes people feel hopeful that good things will happen:  The sun came out as she began speaking – we hope that means an auspicious start to her campaign.
► propitious formal good and likely to bring good results:  It seemed a propitious time to be beginning a new business.