1. One who observes or takes notice; observer 
2. One who makes a remark

Derived forms: observators

• craps
• crapshoot
• crapshooter
• crapulence
• crapulent
• crapulous
• crash
• crash and burn
• crash barrier
• crash course
• crash helmet
• crash land
• crash landing
• crash program
• crash programme
• crash-dive
• crash-test
• crasher
• crashing
• Craspedia
• crass
• crassitude
• crassly
• crassness
• Crassostrea