Word Study
labour party |
labour-intensive |
laboured |
labourer |
labouring |
labourious
| labourite
| laboursaving
| labrador
| labrador peninsula
| labrador retriever
labourious
CIDE DICTIONARY
labourious, adj.
characterized by toilsome effort; same as laborious; -- British spelling. [WordNet 1.5]
For further exploring for "labourious" in Webster Dictionary Online