verbs
move slowly; in the case of people or animals with the body near the ground
"The crocodile was crawling along the riverbed"
to go stealthily or furtively
"..stead of sneaking around spying on the neighbor's house"
grow or spread, often in such a way as to cover (a surface)
"ivy crept over the walls of the university buildings"
is a type of (narrower)
move outward
"The soldiers fanned out"