Viscous.
my understanding
Things that are viscous (pours out thick) are , but are not limited to, molasses, tar, honey, etc.
lava
lava.
The predicate is "pours."
no you are,LOSER
Something that is covered. By google eg The haze is like a thick blanket.
The saying (which is by the way: it never rains but it pours) means that when something bad or unpleasant happens to you there is often something else to make the situation even worse. It is something you would say if you are already late for an appointment and then discover that you have a flat tyre as well.
When something is very rough and thick
The verb of thick is thicken. As in "to thicken something".
Conglomerate rock