Here are the solutions to all the levels of Word Spark Banana.

Word Spark Banana Level 1 – Amids, Maids
Word Spark Banana Level 2 – Codex, Coxed

Word Spark Banana Level 3 – Untie, Unite
Word Spark Banana Level 4 – Codon, Condo
Word Spark Banana Level 5 – Attar, Tatar
Word Spark Banana Level 6 – Weird, Wried, Wider, Wired
Word Spark Banana Level 7 – Wrist, Writs
Word Spark Banana Level 8 – Whale, Wheal
Word Spark Banana Level 9 – Inane
Word Spark Banana Level 10 – Waist, Waits
Word Spark Banana Level 11 – Wides, Wised
Word Spark Banana Level 12 – Ceder, Cered, Creed
Word Spark Banana Level 13 – Waker, Wreak
Word Spark Banana Level 14 – Valor, Volar
Word Spark Banana Level 15 – Ephas, Heaps, Phase, Shape

Word Spark Banana Level 16 – Viola, Voila
Word Spark Banana Level 17 – Crust, Curst
Word Spark Banana Level 18 – Evens, Neves, Seven
Word Spark Banana Level 19 – Evils, Levis, Lives, Veils
Word Spark Banana Level 20 – Oases