As nouns the difference between contraption and apparatus
is that contraption is a machine that is complicated and precarious while apparatus is the entirety of means whereby a specific production is made existent or task accomplished.
contraption
English
Noun
(
en noun)
A machine that is complicated and precarious.
(figuratively, derogatory, or, ironic) Any object.
*
Synonyms
* (mechanical device) contrivance, device, fandango, gadget, mechanism
References
apparatus
English
Noun
(en-noun)
The entirety of means whereby a specific production is made existent or task accomplished.
A complex machine or instrument.
An assortment of tools or instruments.
A bureaucratic organization, especially one influenced by political patronage.
(firefighting) A vehicle used for emergency response.
Usage notes
* Is occasionally used as an invariant plural:
*: Look at all of those apparatus .
Synonyms
* (entirety of means) setup, mechanism, dynamic
* (complex machine) instrument, machinery, device
* (assortment of tools) tools, gear, equipment
* (political patronage organization) machine
Related terms
* apparat