How to Use "plethora" with Example Sentences

1. A plethora of tips are available on presenting designs and public speaking .
2. Out of that plethora of data fell the human brain 's synchronous background hum .
3. Meanwhile , regional co-operation has spawned a plethora of new security forums and organisations .
4. Already , there is a plethora of start-ups offering to help businesses cut greenhouse gases .
5. One reason for the plethora of challengers is that mr bercow lacks support within his own party .