archeology archeology
atom atom
board board
calculation calculation
calculator calculator
certificate certificate
chalk chalk
class class
compass compass
country country
course course
diploma diploma
direction direction
education education
filter filter
formula formula
geography geography
grammar grammar
knowledge knowledge
language language
lesson lesson
library library
literature literature
mathematics mathematics
microscope microscope
number number
pressure pressure
prism prism
professor professor
pyramid pyramid
radioactivity radioactivity
scales scales
space space
statistics statistics
studies studies
syllable syllable
table table
translation translation
triangle triangle
umlaut umlaut
university university
world map world map
