yawn vs pandiculation

yawn and pandiculation both are nouns.

Word	Noun	Adjective	Verb	Adverb
yawn	Yes	No	Yes	No
pandiculation	Yes	No	No	No

As nouns, pandiculation is a hyponym of yawn; that is, pandiculation is a word with a more specific, narrower meaning than yawn:

yawn: an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom
pandiculation: yawning and stretching (as when first waking up)

yawn (noun)	pandiculation (noun)
an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom	yawning and stretching (as when first waking up)

yawn (verb)	pandiculation (verb)
utter a yawn, as from lack of oxygen or when one is tired
be wide open