Onlier

Butte ( onlier )

Source: wiktionary

Such outcrops of younger rock, entirely surrounded by older beds, are called outliers or onliers.

Source: wiktionary

Although influential cases thus have extreme values on one or more of the variables, they can be onliers rather than outliers.

Source: wiktionary

Regression analysts, insofar as they focus on a simple onlier/outlier distinction (where onlier refers to a low-residual case and outlier to a high-residual case), will tend to miss such causal complexity.

Source: wiktionary