When you have something in abundance, it means there is a great amount of it, more than you actually need.
Typical collocations with the noun abundance and the adjective abundant are:
- abundant supply
- abundant land/ harvest
- abundant evidence
- abundant in wildlife/ fish
- an abundance of food/ resources
While the expressions “Thanks in abundance” or “Abundant thanks” are grammatically correct, they’re not very common. You may say, “Abundant thanks for your hospitality”, but this is not a fixed expression people use.
To learn about the many different ways you can express your gratitude, read 112 Phrases for Saying Thank You in Any Situation.