IPA: /ˈplɛntɪtjuːd/
KK: /ˈplɛntɪtud/
A large amount of something; a state of having more than enough of what is needed.
The garden was filled with a plentitude of flowers in every color.
Plentitude is formed from "plenus" (meaning full) and the suffix "-tude" (indicating a state or condition). The word describes the state of being full or abundant.
Think of 'fullness' ('plenus') to remember that 'plentitude' means a state of being full or abundant.