There are options: 1. a good deed 2. an act of kindness I hope that helps :-)

Adjectives could be: selfless, sacrificial, self-sacrificing, self-giving, self-denying, unselfish.... "Selfless" is probably the best choice, given the context that you wrote about the executive.

I mean I looked it up in Merriam and it is defined as "used in religious services". By sacrifice I mean giving up something you want to help others. You know, for example leaving your job as an executive and teaching to unprivileged children. It's a what act/work? Oh, let me see, can we use sacrificing?

Sorry, I do not understand you sentence "We cannot say devotional because it is used in religious services according to Merriam Webster's." You cannot use a word that is in the dictionary? "devotion" is like dedication - seems a little different to "sacrifice". Sacrifice may not be for others. It that case I guess it is not selfless. I sacrifice having icecream so that I can have cream buns. - not really selfless. . Maybe there are several adjectives, depending on the context? Sorry, not much help.