"pullulate" in the verb sense
1. teem, pullulate, swarm
be teeming, be abuzz
"The garden was swarming with bees"
"The plaza is teeming with undercover policemen"
"her mind pullulated with worries"
2. pour, swarm, stream, teem, pullulate
move in large numbers
"people were pouring out of the theater"
"beggars pullulated in the plaza"
3. shoot, spud, germinate, pullulate, bourgeon, burgeon forth, sprout
produce buds, branches, or germinate
"the potatoes sprouted"
4. pullulate
become abundant increase rapidly
5. pullulate
breed freely and abundantly
Source: WordNet® (An amazing lexical database of English)
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