slackening vs thaw

slackening and thaw both are nouns.

Word	Noun	Adjective	Verb	Adverb
slackening	Yes	No	No	No
thaw	Yes	No	Yes	No

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

slackening: an occurrence of control or strength weakening
thaw: a relaxation or slackening of tensions or reserve; becoming less hostile

slackening (noun)	thaw (noun)
an occurrence of control or strength weakening	a relaxation or slackening of tensions or reserve; becoming less hostile
	warm weather following a freeze; snow and ice melt
	the process whereby heat changes something from a solid to a liquid

slackening (verb)	thaw (verb)
	become or cause to become soft or liquid