A score is 20 years so 4 score is 80 years.
Yes there are lots of synonyms for the word scour.
I had to scour my room for my book.I had to scour my bathroom for my mom.
The most traditional is dermabrasion, in which abrasion is used to scour away the surface of the skin.
R. J. Garde has written: 'Research report on effect on unsteadiness and stratification on local scour, (1985-1989)' -- subject(s): Scour (Hydraulic engineering), Scour at bridges
Scoured
look for
A scour pipe is used to flush out sediment or release water. It usually runs near the bottom of a dam.
Alvin G. Anderson has written: 'Scour at bridge waterways' -- subject(s): Scour at bridges
Gay D. Jones has written: 'Scour at bridge waterways' -- subject(s): Scour at bridges
Have the lines water Jetted to scour them properly and get rid of years of crud build up
Jimmy E. Fowler has written: 'Coastal scour problems and methods for prediction of maximum scour' -- subject(s): Rubble mound breakwaters, Scour (Hydraulic engineering), Sea-walls, Underwater pipelines
Burnish, scour, rub...