oscillation vs undulation

oscillation and undulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
oscillation	Yes	No	No	No
undulation	Yes	No	No	No

As nouns, undulation is a hypernym of oscillation; that is, undulation is a word with a broader meaning than oscillation:

Other hypernyms of oscillation include wave.

oscillation (noun)	undulation (noun)
(physics) a regular periodic variation in value about a mean	(physics) a movement up and down or back and forth
a single complete execution of a periodically repeated phenomenon	wavelike motion; a gentle rising and falling in the manner of waves
the process of oscillating between states	an undulating curve