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

Word Spark Mammoth Level 1 – SEASON, WRITER, SILVER, KIWI, PIGEON, DESK, CORN
Word Spark Mammoth Level 2 – WAFFLE, TRIANGLE, PRESENT, BEAR, STATION, BULL

Word Spark Mammoth Level 3 – FRIDGE, POST, SOFA, COOK, MOTHER, DARK, LIPSTICK
Word Spark Mammoth Level 4 – BEE, BELT, HOSPITAL, SCORE, JUPITER, SANTA, CARD
Word Spark Mammoth Level 5 – PANDA, SPHERE, TEACHER, SHELL, CUSTOM, ATHLETE
Word Spark Mammoth Level 6 – OPERA, SISTER, YARD, GAS, AUTUMN, APPLE, GEL, BANK
Word Spark Mammoth Level 7 – STAFF, FLOOD, TURKEY, CATEGORY, JASMINE, GLASS
Word Spark Mammoth Level 8 – BISCUIT, MESSAGE, EASY, ARM, IRON, EQUATOR, ROSE
Word Spark Mammoth Level 9 – CUSTOM, ENVELOPE, SHEEP, MIRACLE, MANGO, WATER
Word Spark Mammoth Level 10 – AUTHOR, TV, ACADEMY, TRACE, FUN, SCENERY, YELLOW

Word Spark Mammoth Level 11 – PRICE, ENJOY, CABINET, SHY, WHITE, DAUGHTER, PIE
Word Spark Mammoth Level 12 – INN, QUIZ, BASEBALL, CHEEK, GUARD, ROLL, PUMPKIN
Word Spark Mammoth Level 13 – CAPTAIN, SIZE, HOMESICK, MEDICINE, KIN, BASKET
Word Spark Mammoth Level 14 – ACADEMY, CLAY, BISCUIT, PLAZA, STUDENT, COTTON
Word Spark Mammoth Level 15 – RAY, KEYBOARD, DOG, STORM, BASE, MATCH, FOX, BOARD
Word Spark Mammoth Level 16 – SAND, GUN, STUDY, ISLAND, TOWEL, FARMER, EYE, WISH
Word Spark Mammoth Level 17 – WATCH, EXAM, FREE, ZEBRA, WRITER, MOON, BIRTHDAY
Word Spark Mammoth Level 18 – MARKET, BLOOM, ROPE, SUMMER, FIST, LOSS, PASSAGE
Word Spark Mammoth Level 19 – MOUTH, WALK, PARTY, PARK, SWEET, LEMONADE, BRAVE
Word Spark Mammoth Level 20 – BILL, HOT, ANCESTOR, NET, HOLIDAY, RAIN, SURFING

Here is the video walkthrough for Word Spark Mammoth