Words related to hippo-

Proto-Indo-European root meaning "horse." Perhaps related to *ōku- "swift."

It forms all or part of: alfalfa; Eohippus; equestrian; equine; equus; hippo-; hippocampus; Hippocratic; Hippocrene; hippocrepian; hippodrome; hippogriff; Hippolytus; hippopotamus; Philip; philippic; Philippines; Xanthippe.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit açva-, Avestan aspa-, Greek hippos, Latin equus, Old Irish ech, Old Church Slavonic ehu-, Old English eoh, Gothic aihwa- all meaning "horse."
hippomania (n.)
"excessive fondness for horses" (especially in reference to the intense and passionate interest in horses developed in some girls between ages 10 and 14), 1956, from hippo- "horse" + mania.
hippomobile (n.)
1900, "A word used in the early days of motor vehicles for a horse-drawn vehicle" [OED], from French, from hippo- "horse" + ending from automobile.
hippophagy (n.)

"act or practice of feeding on horseflesh," 1823, from hippo- "horse" + -phagy "eating" (see -phagous). Ptolemy uses hippophagi of certain nomadic tribes of central Asia. Related: Hippophagous (1828).

Europeans have generally regarded horse-flesh as unfit for food; but hippophagy or horse-eating has always existed among some rude races, and has been advocated by many gastronomers in Europe. In Paris horse-flesh has long been surreptitiously dealt in as a cheap article of diet, and its sale, under strict official supervision, was authorized in 1866. The necessary use of it there during the siege of 1870-1 brought it into more general favor, which has been maintained. It is also eaten to some extent in other countries. [Century Dictionary, 1903]
hippophile (n.)
"horse-lover," 1852, from hippo- "horse" + -phile "one that loves."