stave vs spline

stave and spline both are nouns.

Word	Noun	Adjective	Verb	Adverb
stave	Yes	No	Yes	No
spline	Yes	No	No	No

As nouns, spline is a hypernym of stave; that is, spline is a word with a broader meaning than stave:

stave: one of several thin slats of wood forming the sides of a barrel or bucket
spline: a thin strip (wood or metal)

Other hypernyms of stave include slat.

stave (noun)	spline (noun)
one of several thin slats of wood forming the sides of a barrel or bucket	a thin strip (wood or metal)
a crosspiece between the legs of a chair	a flexible strip (wood or rubber) used in drawing curved lines
(music) the system of five horizontal lines on which the musical notes are written

stave (verb)	spline (verb)
burst or force (a hole) into something
furnish with staves