tact vs delicacy

tact and delicacy both are nouns.

Word	Noun	Adjective	Verb	Adverb
tact	Yes	No	No	No
delicacy	Yes	No	No	No

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

Other hyponyms of tact include diplomacy, discreetness, finesse, address, savoir-faire, tactfulness.

tact (noun)	delicacy (noun)
consideration in dealing with others and avoiding giving offense	the quality of being beautiful and delicate in appearance
	subtly skillful handling of a situation
	lack of physical strength
	slenderness
	lightness in movement or manner
	refined taste; tact
	something considered choice to eat