sequential, ordered
instead of being that
effective.
Programme
end
Apothecary
customize
defeated
applied, exercised
Tandem means that first you hook the power sources to each other, then to whatever it is that's being powered - like the stoker and the captain on a tandem bike
The other word which is widely used instead of doorknob is latch.
We drove the horses tandem. (One behind another) We saw pictures of tandem bicycles.
One alternative word that can be used instead of "they" is "them."