experimenter
adult
analysis
beard
blond
blue
boy
chemical
chemicals
chemist
chemistry
coat
color
colors
costume
crazy
dark
discovery
emotional
experiment
experiments
flask
green
hair
head
insane
invention
lab
laboratory
light
lighting
long
mad
male
man
medical
mixing
occupation
person
pharmaceutical
pharmacology
professor
proof
red
scientist
test
trouble
tube
working