lemon vs tang

lemon and tang both are nouns.

Word	Noun	Adjective	Verb	Adverb
lemon	Yes	No	No	No
tang	Yes	No	No	No

As nouns, tang is a hypernym of lemon; that is, tang is a word with a broader meaning than lemon:

Other hypernyms of lemon include flavor, flavour, nip, relish, sapidity, savor, savour, smack.

lemon (noun)	tang (noun)
an artifact (especially an automobile) that is defective or unsatisfactory	any of various kelps especially of the genus Laminaria
a strong yellow color	any of various coarse seaweeds
a distinctive tart flavor characteristic of lemons	brown algae seaweed with serrated edges
yellow oval fruit with juicy acidic flesh	a common rockweed used in preparing kelp and as manure
a small evergreen tree that originated in Asia but is widely cultivated for its fruit	a tart spicy quality
	the taste experience when a savoury condiment is taken into the mouth