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Level 13 - NYEITRLE
The answer to this puzzle is:
Words: LIENTERY, INERTLY, RETINE, RELINE, TRIENE, LINTER, LENITY, RETILE, EERILY, LIERNE, NITERY, RELENT, LENITE, YEELIN, INLET, RENTE, RELIT, TILER, TREEN, TRINE, EYRIE, RILEY, LITRE, TEENY, LINTY, TERNE, RELET, YENTE, LINEY, ELINT, RETIE, NITER, NITRE, NITE, EYEN, EYRE, EYNE, EELY, TREY, RILE, TYNE, RIEL, EERY, LINY, EYER, LEET, INLY, RETE, LIER, TERN, LEER, LIEN, TYRE, REIN, TILE, RELY, LITE, LINE, TREE, TEEN, ERNE, LYRE, LENT, REEL, TINE, TELE, YETI, LIRE, LINT, LYE, TEN, EEL, NEE, ERE, TRY, NET, TIE, EYE, TIN, YET, LEI, LET, NIL, TEE, NIT, LIN, YEN, LEE, TEL, LIT, LIE, IRE, YIN, TIL, RYE
Bonus words:
LIENTERY, INERTLY, RETINE, RELINE, TRIENE, LINTER, LENITY, RETILE, EERILY, LIERNE, NITERY, RELENT, LENITE, YEELIN, INLET, RENTE, RELIT, TILER, TREEN, TRINE, EYRIE, RILEY, LITRE, TEENY, LINTY, TERNE, RELET, YENTE, LINEY, ELINT, RETIE, NITER, NITRE, NITE, EYEN, EYRE, EYNE, EELY, TREY, RILE, TYNE, RIEL, EERY, LINY, EYER, LEET, INLY, RETE, LIER, TERN, LEER, LIEN, TYRE, REIN, TILE, RELY, LITE, LINE, TREE, TEEN, ERNE, LYRE, LENT, REEL, TINE, TELE, YETI, LIRE, LINT, LYE, TEN, EEL, NEE, ERE, TRY, NET, TIE, EYE, TIN, YET, LEI, LET, NIL, TEE, NIT, LIN, YEN, LEE, TEL, LIT, LIE, IRE, YIN, TIL, RYE