lymph vessel vs lacteal

lymph vessel and lacteal both are nouns.

Word	Noun	Adjective	Verb	Adverb
lymph vessel	Yes	No	No	No
lacteal	Yes	Yes	No	No

As nouns, lacteal is a hyponym of lymph vessel; that is, lacteal is a word with a more specific, narrower meaning than lymph vessel:

lymph vessel: a vascular duct that carries lymph which is eventually added to the venous blood circulation
lacteal: any of the lymphatic vessels that convey chyle from the small intestine to the thoracic duct

Other hyponyms of lymph vessel include thoracic duct.

lymph vessel (noun)	lacteal (noun)
a vascular duct that carries lymph which is eventually added to the venous blood circulation	any of the lymphatic vessels that convey chyle from the small intestine to the thoracic duct

lymph vessel (adjective)	lacteal (adjective)
	relating to or consisting of or producing or resembling milk