1) General subject: component, constituent element, integrant (чего-л.), part, element
2) Computers: extension, feature (программный, операционной системы и т. д.)
3) Geology: member
4) Biology: constituent (см. тж component)
5) Naval: companion
6) Medicine: builder, ingredient
8) Mathematics: (-а) component part, (-а) constituent, (-а) ingredient, (-а) member
9) Automobile industry: component part, compounding material
10) Metallurgy: ingredient (напр. сплава)
11) Textile: intermixture
12) Information technology: clause
13) Oil: additive, reductant
14) Immunology: piece
15) Astronautics: building block, reactant
17) Advertising: component material, compounding ingredient
18) Microelectronics: detail
19) Programming: a component
20) Makarov: builder (основной), component (см.тж. компонента), component element, constituent (смеси), entry (напр. списка, таблицы), node, partial, subarray, term
21) SAP.tech. module
22) Pharmacy: derivative
Универсальный русско-английский словарь. Академик.ру. 2011.