precursor /prē-kûrˈsər/

1. Something that exists or goes in advance of another
2. An indication of the approach of an event
3. A forerunner, herald or harbinger
4. A predecessor
5. A substance from which the one in question is derived or manufactured (chem)

• grooms
• groomsman
• groomsmen
• groove
• grooved
• groover
• groovers
• grooves
• groovier
• grooviest
• groovily
• grooviness
• grooving
• groovy
• grope
• groped
• groper
• gropers
• gropes
• groping
• gropingly
• grosbeak
• grosbeaks
• groschen
• groschens