kumquat vs citrus

kumquat and citrus both are nouns.

Word	Noun	Adjective	Verb	Adverb
kumquat	Yes	No	No	No
citrus	Yes	No	No	No

As nouns, citrus is a hypernym of kumquat; that is, citrus is a word with a broader meaning than kumquat:

kumquat: small oval citrus fruit with thin sweet rind and very acid pulp
citrus: any of numerous fruits of the genus Citrus having thick rind and juicy pulp; grown in warm regions

Other hypernyms of kumquat include citrous fruit, citrus fruit.

As nouns, citrus is a hypernym of kumquat; that is, citrus is a word with a broader meaning than kumquat:

kumquat: any of several trees or shrubs of the genus Fortunella bearing small orange-colored edible fruits with thick sweet-flavored skin and sour pulp
citrus: any of numerous tropical usually thorny evergreen trees of the genus Citrus having leathery evergreen leaves and widely cultivated for their juicy edible fruits having leathery aromatic rinds

Other hypernyms of kumquat include citrus tree.

kumquat (noun)	citrus (noun)
small oval citrus fruit with thin sweet rind and very acid pulp	any of numerous fruits of the genus Citrus having thick rind and juicy pulp; grown in warm regions
any of several trees or shrubs of the genus Fortunella bearing small orange-colored edible fruits with thick sweet-flavored skin and sour pulp	any of numerous tropical usually thorny evergreen trees of the genus Citrus having leathery evergreen leaves and widely cultivated for their juicy edible fruits having leathery aromatic rinds