This puzzle 21 extra words make it fun to play.
File pdf for level 521
The words included in this word game are:
INK, INN, KIN, NAP, PAN, PIN, NIP, PAIN, PINK, AKIN, NAPKIN.
The extra or bonus words are:
PAK, AIN, PIA, PINNA, PIAN, NAN, KINA, KNAP, PINA, KAIN, NAIN, ANN, KIP, NAIK, PAIK, ANI, KAN, KAI, PIKA, NIPA, IKAN.