1) Altruistic 2) Concerned only with others 3) Considerate 4) Generous 5) Kind 6) Liberal 7) Magnanimous 8) Noble 9) Not egoistic 10) Ready to help others 11) Thoughtful 12) Unselfish Found on https://www.crosswordclues.com/clue/selfless
Self'less adjective Having no regard to self; unselfish. « Lo now, what hearts have men! they never mount As high as woman in her selfless mood.» Tennyson. Found on http://www.encyclo.co.uk/webster/S/60