infection, insurance

noun:  infection, insurance. 

The meaning is distinguished by the context of the sentence.  You can't used this in isolation and expect the other person to know instantly which word you're referring to.

Examples:
I need to buy car insurance.
Not:  Do you have insurance?

The infection spread throughout the whole school.
Not:  You finish infection?





Sometimes used in conjunction with:
verb, noun classifier:  spread, spread out, to splash or spill


CL5: spread, splash, spill. 
Uses an outward radiating moment.

This is generally used in conjunction with liquid, gases, and germs.

Examples:
liquid:  spilled milk, overflowing bathtub or a huge flood
gas/chemical:  The chlorine spilled out from the train crash.
germs/infection:  The infection spread to her lungs.