These ROOT-WORDS are DROME & DROMOS which come from the Greek and mean RUNNING. Sometimes this ROOT is spelled DROMOUS and is found at the end of a word. Then it is called a Suffix, but that is very rare. I’m certain you know that there is the two-humped camel as well as the dromedary. The dromedary is the swift one and can run a hundred miles in one day’s travel. It is my guess that because of this speed, he was given a name with DROME, running, in it.
1. Dromos : DROMOS (drom’ os) n.’
A long narrow course for foot racing: A large specially prepared area
2. Dromedary : DROME dary (drom’ e dar y) n.
A swiftly running camel
3. Prodromal : pro DROM al (pro drom’ al) adj.
Precursory; as, prodromal stages of disease
4 Dromedarian : DROME darian (drom e dar’ i an) n.
One who rides a dromedary
5. Dromograph : DROMO graph (drom’ o graf) n.
A chart for recording speed changes
6. Dromometer : DROMO meter (dro mom’ e ter) n.
An apparatus for measuring speed
7. Dromotropic : DROMO tropic (drom o trop’ ik) adj.
Affecting the cardiac muscle
8. Airdrome : air DROME (air’ drome) n.
9. Prodromous : pro DROMO us (prod’ ro mus) n.
A preliminary publication; introductory work
10. Hydrodromica : hydro DROM ica (hie dro drom’ i ka) n.
The swimming bugs
11. Hippodromist : hippo DROM ist (hi pod’ ro mist) n.
A circus rider or trainer
12. Hydrodrome : hydro DROME (hie’ dro drome) n.
A boatlike vessel used to skim the surface of the water