colic vs lead colic

colic and lead colic both are nouns.

Word	Noun	Adjective	Verb	Adverb
colic	Yes	No	No	No
lead colic	Yes	No	No	No

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

colic: acute abdominal pain (especially in infants)
lead colic: symptom of chronic lead poisoning and associated with obstinate constipation

Other hyponyms of colic include painter's colic.

colic (noun)	lead colic (noun)
acute abdominal pain (especially in infants)	symptom of chronic lead poisoning and associated with obstinate constipation