what are some synonyms for alcohol tolerance?

One idiomatic expression is: Hold one’s liquor

To be able to consume alcohol without becoming noticeably intoxicated or exhibiting other negative effects, such as becoming ill or unconscious. To have a high tolerance for alcohol.

• I'm sorry for acting like such a fool at the party—I don't even remember what happened. I guess I just can't hold my liquor.

(The Free Dictiinary)

Also:

drink someone under the table :

to drink more alcohol than someone else without becoming as drunk as they do.

• She could drink all the men under the table.

(MacMillan Dictionary)