helpCan I help you get that?
assistformalThe army arrived to assist in the search.
collaborateWe collaborated on the project.
cooperateSeveral countries are cooperating in the relief effort.
benefitThe children have benefited greatly from the new facilities.
give someone a handinformalDo you think you could give me a hand with these heavy boxes?
do someone a favourUKinformalCould you do me a favour and buy me some milk while you're out?