Labour-intensive and Time-consuming

Labour-intensive adjective - Requiring a large expenditure of labor but not much capital.

Time-consuming and labour-intensive are semantically related. In some cases you can replace phrase "Time-consuming" with "Labour-intensive", this phrases are similar.

Time-consuming adjective - Of a task that takes time and patience.

Labour-intensive and time-consuming are semantically related. You can use "Labour-intensive" instead an adjective phrase "Time-consuming".