Abound or swarm (with) (4)
I believe the answer is:
teem
I believe this is a double definition.
'abound' is the first definition.
(I've seen this before)
'swarm with' is the second definition.
(thesaurus)
(Other definitions for teem that I've seen before include "(Of rain) fall heavily" , "Abound - pour" , "Bear" , "stream" , "(Of rain) pour down" .)