cottage industry 
noun
A business or manufacturing activity carried on in people’s homes: weaving was an important cottage industry [mass noun]: conditions in cottage industry were hardly rosy...
- Medicine, which was largely a cottage industry until the Second World War, has been transformed by several factors.
- The considerable increase in business has created a cottage industry in the professions.
- Despite stiff competition, there is a big demand for cheap varieties of detergent powder, which can be manufactured as a cottage industry.
- transmit
- transmittable
- transmittal
- transmittance
- transmitter
- transmogrification
- transmogrify
- transmontane
- transmundane
- transmural
- transmutability
- transmutable
- transmutation
- transmutational
- transmutationist
- transmutative
- transmute
- transmuter
- transnational
- transnationalism
- transnationally
- transoceanic
- transom
- transomed
- transom window