apogee
Fulcrum
state
Pithy, terse.
ORIGMIorigin
gist
insist
Debate.
Can't think of an instance in which it would. "Main", is a comparative word which indicates by definition that it is one option among others. "My main man," means that this is the one who is the best among the others. The "main" point in an argument is the one that is most important.
dispute
argument?
specious
Argument, squabble or disunity.
main idea
main
Point is a word which has several meanings. A point can be a sharp, tapered end such as the tip of a knife. It can also be an opinion, idea, or fact used to form an argument. Another meaning of the word point is the purpose of something. Finally, the word also means an exact location in mathematics.
justify, confirm, explain, condone, support, sustain