help (especially money, advice, medical assistance)

help, support

(of two kinds of things) first one and then the other

substitute

a person who helps another (especially as a deputy or as a junior worker)

helper

giving additional help or support

supplementary

a person who is (to be) given another person's authority etc

assistant, agent

a person who helps

assistant

a faithful supporter, especially one who obeys without question the orders of a leader

follower

an army officer below a captain; junior officer in the Navy

assistant

(a document giving) authority to represent or act for another (especially in voting at an election)

agent

coming after the first; less important or less strong

subordinate; less important

kept for use when needed; additional to what is being or will be used; a spare part (for a machine or engine); (to agree) to avoid hurting, punishing, destroying, (a person, building etc)

extra, reserve

to take the place of a person who is ill, absent etc

substitute

submarine; substitute; subscription; subtitles

substitute

(a person, business etc) not as important, high in position etc as the main person, business etc

secondary, helpful

a person or thing taking the place of, acting for, another

alternative

acting as a substitute

person or thing that acts as

a person learning to, able to, take the place of another (especially an actor)

substitute