100 years
century
100th aniversary
centennial
200th anniversary
bicentennial
50th anniversary
semicentennial
150th anniversary
sesquicentennial
centum (Latin)
hundred
sesqui- (Latin)
one and one-half
kyklos (Greek)
wheel
mille- (Latin)
thousand
thousand years
millennium
100 feet
centipede
1,000 feet
millipede
measures distance on foot
pedometer
gets around on foot
pedestrian
one who measures vision
optometrist
measures time
chronometer
labored, tedious, dull
pedestrian
measures heat
thermometer
sells optical goods
optician
time and time again
chronic
metron (Greek)
measure
optikos (Greek)
vision
therme (Greek)
heat
chronos (Greek)
time