What's the difference between flooder and floorer?

Flooder

Definition:

• (n.) One who floods anything.

Example Sentences:

Floorer

Definition:

• (n.) Anything that floors or upsets a person, as a blow that knocks him down; a conclusive answer or retort; a task that exceeds one's abilities.

Example Sentences:

• (1) For this, the PBLs of nine floorers (aged 25-58 years, exposure time 8-35 years) were subsequently labelled with monoclonal antibodies OKT4, OKT8, OKT11, anti-Leu 7 and anti-Leu 12.
• (2) The problem of early degenerative lesions of knee joints in occupational groups of floorers and roofers has been presented.