Here is the full list of all 43 Uncle Nook's Monster Emporium achievements.
Banish 10 Spiders
Banish 1 Chicken Boy
Banish 1 Grabber
Banish 1 Zombie Head
Banish 1 Ice Slug
Banish 1 Floating Face
Banish 1 Spider
Banish 10 Meat Men
Banish 1 Gaint Hand
Banish 1 Falling Hand
Banish 1 Long Man
Banish 1 Meat Man
Banish 1 Void Walker
Don't give up
You Died 50 Times
Banish 10 Chicken Boy
Banish 100 Chicken Boy
Beat Ending 1
Beat Ending 2
Beat Ending 3
Beat Ending 4
Banish 10 Falling Hands
Banish 100 Falling Hands
Banish 10 Floating Faces
Banish 100 Floating Faces
Banish 10 Gaint Hands
Banish 100 Gaint Hands
Find the Golden Key
Banish 10 Grabbers
Banish 100 Grabbers
Banish 10 Long Men
Banish 100 Long Men
Banish 100 Meat Men
Banish 10 Ice Slugs
Banish 100 Ice Slugs
Banish 100 Spiders
Banish The Broken
Banish The Chicken Man
Banish The Skinless
Banish 10 Void Walkers
Banish 100 Void Walkers
Banish 10 Zombie Heads
Banish 100 Zombie Heads