Interdimensional is the travel between dimensions, intercontinental is travel between continents... Also Powder_proffessional got banned again, not a perma-ban though (I think)
Interplanetary, is travel between planets, interstellar is from star system to star system, intergalactic is from galaxy to galaxy and last but not least, interclustertary is the travel between clusters of galaxies, like the local group
the_new_powder99999 is the Korlonian empire Interplaneter Interselre Intergalaic
I am all in for the cold war. Lets keep building ships and stations, space and ground and continuing to nerd away :)