a ‧ bound /əˈbaʊnd/ BrE AmE verb [intransitive]
[ Date: 1300-1400 ; Language: Old French ; Origin: abonder , from Latin abundare , from ab- 'away' + unda 'wave' ]
to exist in very large numbers:
Rumours abound as to the reasons for his resignation.
Examples of this abound in her book.
abound with/in something phrasal verb
if a place, situation etc abounds with things of a particular type, it contains a very large number of them:
The forests abound with deer, birds, and squirrels.