Level 1
Fest, Cheer
Level 2
Gold, Green
Level 3
Gift, Gnome
Level 4
Joy, Bag, Red
Level 5
Celebrate

Level 1
Coat, Glove
Level 2
Pole, North
Level 3
Wool, Scarf
Level 4
Ski, Ice, Cap
Level 5
Snowflake

Level 1
Doll, Train
Level 2
Yoyo, Teddy
Level 3
Lego, Truck
Level 4
Cup, Car, Gym
Level 5
Xylophone

Level 1
Book, Patio
Level 2
Sofa, Couch
Level 3
Calm, Quiet
Level 4
Rug, Bed, Cat
Level 5
Fireplace

Level 1
Santa, Claus, Sleigh
Level 2
Fairy, Comet, Grinch
Level 3
Star, Carol, Garland
Level 4
Present, Tradition

Level 1
Frost, Snowy, Icicle
Level 2
Glacier, Avalanche
Level 3
Throw, Igloo, Penguin
Level 4
White, Brisk, Tundra

Level 1
Block, Board, Jigsaw
Level 2
Kazoo, Slide, Puppet
Level 3
Sandbox, Treehouse
Level 4
Spinner, Whirligig

Level 1
Warm, Baking, Coffee
Level 2
Rest, Quilt, Cushion
Level 3
Soft, Peace, Welcome
Level 4
Serenity, Fountain

Level 1
Bell, Jingle, Prayer, Festivity
Level 2
Elf, Scrooge, Rudolph, Reindeer
Level 3
Cookie, Stuffing, Gingerbread

Level 1
Icecream, Popsicle, Snowboard
Level 2
Snow, Aurora, Crystal, Blizzard
Level 3
Winter, Pinecone, Hibernation

Level 1
Robot, Spaceship, Transformer
Level 2
Ball, Rattle, Bubbles, Tricycle
Level 3
Wagon, Trampoline, Hoverboard

Level 1
Lamp, Candle, Chimney, Firewood
Level 2
Puffy, Pillow, Blanket, Comfort
Level 3
Birdcage, Laughter, Chocolate

Level 1
Eve, Tree, Merry, Ribbon, Decoration

Level 2
Parka, Slush, Earflap, Snowball, Thermometer

Level 3
Slinky, Plushie, Frisbee, Stroller, Figurine

Level 4
Joy, Smile, Family, Cuddle, Harmony, Happiness

The achievements are all mostly self explanatory. Check out Stamp #11 for my one note.

Stamp #1
10 boards completed!

Stamp #2
25 words completed!

Stamp #3
50 letters used!

Stamp #4
Five words of 5 letters found!

Stamp #5
One daily grid completed

Stamp #6
Two words of 8 letters found!

Stamp #7
Two categories completed!

Stamp #8
100 letters used!

Stamp #9
Two words of 7 letters found!

Stamp #10
10 hints used!

Stamp #11
Five stars have been collected on the main menu - these are snowflakes that pop down from the top of the screen about every 30 seconds or so. You can also click them for more hints!

Stamp #12
One Very Hard level completed!