Yep. Just add...
...to the object definition.
gate : scenery "the gate" start_at = "crossroads" conspicuous="false";
OMG. That is so, so helpful. I can now have adjectives, as well. In the case of my gate example, as it's now an object, I can also move it between rooms so that I don't have to duplicate the code in both rooms.
Yeah, I don't tend to use 'objects' for scenery or NPCs in 8-bit systems like the PAW, preferring to use flags instead, but it's so much easier if you use them in Adventuron. It cuts down on so much manual coding.