✅ Rest refers to a period of inactivity, particularly one in which you can temporarily relax (I had a rest between meetings).
✅ Downtime refers to a period, during work, in which you’re not busy or productive (We get some downtime between shifts).
✅ Both of these words refer to idle periods during work, however, both terms can also refer to periods of relaxation outside of work.
✅ Downtime suggests that the period of rest is only temporary (In my downtime, I like to knit; It’s important to rest on the weekends).
✅ Rosy describes something that is promising (rosy prospects).
✅ Auspicious describes something that promises success or is favorable (an auspicious job opportunity).
✅ Rosy and auspicious both describe promising circumstances.
✅ Rosy suggests positive and cheerful circumstances, whether they involve success or not (a rosy marriage). Auspicious particularly suggests success (an auspicious business deal).
✅ Hopeful describes something that expresses hope or suggests that everything will turn out alright (After several tests, we finally had a hopeful result).
✅ Upbeat describes something that is positive and cheerful or that reflects a cheerful attitude (He tried to always greet people in a friendly, upbeat way).
✅ Both these words describe positive feelings.
✅ Upbeat suggests a cheerful attitude or sense of positivity, whereas hopeful suggests the possibility of things being okay without them being okay at the moment (The movie had a sad but ultimately hopeful ending).