weariness vs grogginess

weariness and grogginess both are nouns.

Word	Noun	Adjective	Verb	Adverb
weariness	Yes	No	No	No
grogginess	Yes	No	No	No

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

weariness: temporary loss of strength and energy resulting from hard physical or mental work
grogginess: a groggy state resulting from weariness

Other hyponyms of weariness include asthenopia, eyestrain, jet lag, exhaustion, logginess, loginess, senioritis.

weariness (noun)	grogginess (noun)
temporary loss of strength and energy resulting from hard physical or mental work	marginal consciousness
	a groggy state resulting from weariness
	a dazed and staggering state caused by alcohol