endive vs witloof

endive and witloof both are nouns.

Word	Noun	Adjective	Verb	Adverb
endive	Yes	No	No	No
witloof	Yes	No	No	No

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

endive: variety of endive having leaves with irregular frilled edges
witloof: young broad-leaved endive plant deprived of light to form a narrow whitish head

Other hyponyms of endive include Belgian endive, French endive.

As nouns, endive and witloof are synonyms defined as:

endive and witloof: widely cultivated herb with leaves valued as salad green; either curly serrated leaves or broad flat ones that are usually blanched

Other synonyms of endive include Cichorium endivia.

endive (noun)	witloof (noun)
variety of endive having leaves with irregular frilled edges	young broad-leaved endive plant deprived of light to form a narrow whitish head
widely cultivated herb with leaves valued as salad green; either curly serrated leaves or broad flat ones that are usually blanched	widely cultivated herb with leaves valued as salad green; either curly serrated leaves or broad flat ones that are usually blanched