Project is a one time initiative with a well defined objective and definitive start and end dates. Projects are usually not repetitive.
Process is the sequence of tasks which are repetitively performed to ensure continuity in operations. A process have a definitive start date, but it does not have any end date.
An application-oriented question on the topic along with responses can be seen below. The best answer was provided by R Rajesh on 14th February 2019.
Applause for all the respondents- Hari Shyam, Nikzad, R Rajesh, Kiran Kumar, Somrita Chatterjee
Also review the answer provided by Mr Venugopal R, Benchmark Six Sigma's in-house expert.