My list I've made from my experience and comments:
Cum
Blood
Galaxy
Human/Humanity
Shit
Sex
Liquor/Beer
Coffee
Water
Death (causes a Game Over, but doesn't do anything otherwise)
Health/Cure(reverses Cancer)
Cancer
Hell/Evil
Heaven
Tea,
Cum/Sperm
Sickness
Emotion
green
Blue
yellow
Red
black
purple
white
rainbow
dark
Random
immortality
Joe and 294
hair
combine angel and sin to get a a godlike being you can fuck
Insanity
heat
Cold
Cat
dog
Reptile
Monster
Centipede
Man
Slime
Feathers
Love
rage
Bat
Spirit+death= ghost girl
giving her a cup of breasts twice, does about what you'd expect.
human with ghost girl becomes the grim reaper.
Tree
Alien
Tentacle
Jellyfish
Silence
Void
Time
Child
Life (when she's normal)
Demon (not devil)
Chicken
Cow
Deer
Dragon
Fox
Spider
Clown
Gun
Greed
Sadness
Sheep
Nothing
Everything
Me
Skeleton
Science
Machine
Mother
Family
Bear
time
Reply
Press - death scene
Knife
Fangs
Door
Fear
Cute
Meat
Fire
Fire x2 - death
Moth
Snake
Anime
Wisdom - death Scene,
Nature
Light
Nightmare
Vengeance
Infinity
Gravity - Death Scene
Fate
Dream
Bunny
Antimatter - death scene
Demon (demon 5x)
Angel (5x)
Night
Day
Freedom
Future
Fairy
Mommy
Doll
Art
Fox (9x)
Shark
Octopus
Water (4x) then ice
Water (4x) then fire
Entropy
Bee
Crocodile
Inside & outside - death scene
Down
Right
Mantis
Snail (2x - then lust)
Big *** (Has 3 stages, 3x, 5x, and 10x. Each has their own H Scene)
Pregnant *** (3 Stages, 3x, 5x, 10x. Each has their own H Scene.)
Books
Music
Arrogance
World
War
you can lust mantis but you'll get a new death scene once you exit the scene
blood x5 (+5) evolution
Immortal + death (x2)
mud
Also everything + nothing
Chainsaw + demon
Worm - 2x
Worm 2x + human =
HoruBrain (easter egg)
malice
electricity
force - death