What's the difference between discountenance and discountenancer?

Discountenance

Definition:

• (v. t.) To ruffle or discompose the countenance of; to put of countenance; to put to shame; to abash.
• (v. t.) To refuse to countenance, or give the support of one's approval to; to give one's influence against; to restrain by cold treatment; to discourage.
• (n.) Unfavorable aspect; unfriendly regard; cold treatment; disapprobation; whatever tends to check or discourage.

Example Sentences:

Discountenancer

Definition:

• (n.) One who discountenances; one who disfavors.

Example Sentences:

• (1) Looking at these methods, the neurobiologist, generally impermeable to concepts of sampling, statistical bias, efficiency, cost of effort and distribution-free, is discountenanced and continues old laboratory usages and customs.