decay vs deliquesce

decay is a noun but deliquesce is not a noun.

Word	Noun	Adjective	Verb	Adverb
decay	Yes	No	Yes	No
deliquesce	No	No	Yes	No

As verbs, deliquesce is a hyponym of decay; that is, deliquesce is a word with a more specific, narrower meaning than decay:

Other hyponyms of decay include decompose, molder, moulder, rot, go bad, spoil, putrefy.

decay (noun)	deliquesce (noun)
the organic phenomenon of rotting
a gradual decrease; as of stored charge or current
the process of gradually becoming inferior
the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
an inferior state resulting from the process of decaying

decay (verb)	deliquesce (verb)
fall into decay or ruin	melt or become liquid by absorbing moisture from the air
lose a stored charge, magnetic flux, or current	melt away in the process of decay
undergo decay or decomposition