weariness vs logginess

weariness and logginess both are nouns.

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

As nouns, logginess is a hyponym of weariness; that is, logginess 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
logginess: a dull and listless state resulting from weariness

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

weariness (noun)	logginess (noun)
temporary loss of strength and energy resulting from hard physical or mental work	a dull and listless state resulting from weariness