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

Word Spark Candy Level 1 – Thrawing, Wrathing
Word Spark Candy Level 2 – Capsules, Scaleups, Upscales

Word Spark Candy Level 3 – Weathers, Wreathes
Word Spark Candy Level 4 – Stroller, Trollers
Word Spark Candy Level 5 – Restrain, Restrain, Strainer, Terrains
Word Spark Candy Level 6 – Hangouts, Thousand
Word Spark Candy Level 7 – Generate, Teenager
Word Spark Candy Level 8 – Yellowed
Word Spark Candy Level 9 – Agonised, Diagnose
Word Spark Candy Level 10 – Rateable, Tearable
Word Spark Candy Level 11 – Coursing, Scouring, Sourcing
Word Spark Candy Level 12 – Cheating, Teaching
Word Spark Candy Level 13 – Allovers, Overalls
Word Spark Candy Level 14 – Assertor, Assorter, Oratress, Reassort
Word Spark Candy Level 15 – Allseeds, Leadless

Word Spark Candy Level 16 – Stalking, Talkings
Word Spark Candy Level 17 – Cacklers, Crackles, Clackers
Word Spark Candy Level 18 – Pastries, Piatries, Piastres, Raspiest
Word Spark Candy Level 19 – Youthful
Word Spark Candy Level 20 – Hoppings, Shopping