For example, in an aerospace business setting we are trying to find a title for the process to get approval for a new good or service. We are suggesting names like: green light, take off, launch pad, etc...
What are these names called? Is there a word for it? They are not euphemisms because we're not referring to something unpleasant or embarrassing. It's not stenography because we're not trying to hide anything.
Usage example: I don't like "green light" as a (word) because it's too vague. I think a better (word) would be "take off".
I'm thinking maybe jargon is the right word for it. It would not be industry-specific or even company-specific jargon. I think the phrase I'm looking to identify with the word would be department specific.