Equivalent in seriousness to; virtually the same as.
Mid 17th century: from the earlier verb tantamount ‘amount to as much’, from Italian tanto montare.
“His reaction is tantamount to guilt, he may as well have confessed.”
Rampallion (noun) (rare) (archaic)
A ruffian, a villain, a rascal.
Late 16th century; earliest use found in Thomas Nashe (d. c1601), writer. Origin uncertain. Perhaps from ramp + -allion, perhaps showing alteration of rascallion by association with ramp. Perhaps compare later ramscallion, rapscallion, tatterdemalion.