5 Chars:
16 BYWAY
13 COYLY
12 DOYLY
12 DRYLY
16 DYKEY
14 FEYLY
16 FLYBY
12 GAYLY
14 GYPSY
15 MYOPY
16 MYTHY
16 PYGMY
14 SHYLY
15 SKYEY
11 SLYLY
13 STYMY
16 THYMY
13 TYPEY
14 WRYLY
18 XYLYL
16 YECHY
15 YEUKY
15 YOLKY
17 YUCKY
15 YUMMY

4 Chars:
10 EYRY
12 TYPY
10 YAYS

3 Chars:
 9 YAY