You are just playing the extreme relativism game. I find this sort of convenient relativism very sophomoric.
Terrorism has a meaning, and unlike your silly claims, the meaning is not dependent upon who is committing violence, but upon the nature and target of the violence. If a group attacks a military target, they are engaged in guerilla warfare. If they attack civilians because they are civilians, they are engaging in terrorism.
As to my original point, however, just because you make up your own meanings, that does not make such meanings valid. Here are some various definitions for the word "Militant"
define:militant - Google Search
Now, you may wish to conflate that with terrorism in order to rationalize and normalize terrorism, but why you would do that is anybody's guess.