愛猫[aibyou] pet cat
愛猫家[aibyouka] cat lover
虎猫[toraneko] ocelot (feline, Felis pardalis)
黒猫[kuroneko] black cat
三毛猫[mikeneko] tortoise-shell cat

山猫[yamaneko] wildcat (Felis silvestris)
山猫争議[yamanekosougi] wildcat strike
招き猫[manekineko] beckoning cat
猫に小判[nekonikoban] (to cast) pearls before swine

亜科[aka] subfamily
医科[ika] medical science
医科大学[ikadaigaku] medical school
家庭科[kateika] home economics
科名[kamei] family name

科する[kasuru] to inflict
科学[kagaku] science
科学院[kagakuin] science institute
科学技術[kagakugijutsu] science and technology