genus Calluna vs ling

genus Calluna and ling both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Calluna	Yes	No	No	No
ling	Yes	No	No	No

genus Calluna (noun)	ling (noun)
a genus containing the species Calluna vulgaris (Calluna)	elongated marine food fish of Greenland and northern Europe; often salted and dried
	American hakes
	elongate freshwater cod of northern Europe and Asia and North America having barbels around its mouth
	common Old World heath represented by many varieties; low evergreen grown widely in the Northern Hemisphere
	water chestnut whose spiny fruit has two rather than 4 prongs