When something is available in abundance, it means there is plenty of it. Alternate phrases to describe an abundance include 'aplenty', 'overflowing', 'bountiful', 'copious', 'ample', 'excessive' and 'ample'. 'Plentiful' and 'abounding' can also be used to convey the same meaning. Another option is to use 'in profusion', 'galore' or 'in large quantities'. For situations when the abundance is overwhelming, one can say it's 'teeming' or 'swarming'. Finally, the expression 'in great supply' is appropriate when the abundance is not necessarily overwhelming but still robust. Overall, it is important to use appropriate words to convey exactly what is meant when we say that something is available in abundance.