馬

Mactra chinensis (species of trough shell)

sire (horse)

Omphalius pfeifferi pfeifferi (subspecies of top shell)

wild horse; unmanageable horse

Chollima; winged horse of East Asian mythologies

clearance hole (hole for a bolt, screw, etc., which is large enough to allow the thread, etc. to pass through)

razor clam (Solen strictus)

yearling; one-year-old horse

thoroughbred horse

horse-carrying military ship

dead horse

Derogatory

stupid horse; useless horse; crowbait

curry-comb

Kiso horse (Japanese indigenous horse breed); kisouma

carfare; fare; transportation expenses

black scraper fish (Novodon modestus)

mountain zebra (Equus zebra)

dunghill

Buddhism

horse-headed demon (in hell)

spare horse

riding ground; paddock

Astronomy

Equuleus (constellation); the Colt

Anatomy

parahippocampal gyrus; hippocampal gyrus

Kansai horse

Wu dynasty reading of Chinese characters