lesion vs tubercle

lesion and tubercle both are nouns.

Word	Noun	Adjective	Verb	Adverb
lesion	Yes	No	No	No
tubercle	Yes	No	No	No

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

Other hyponyms of lesion include ulcer, ulceration.

lesion (noun)	tubercle (noun)
any localized abnormal structural change in a bodily part	a protuberance on a bone especially for attachment of a muscle or ligament
an injury to living tissue (especially an injury involving a cut or break in the skin)	small rounded wartlike protuberance on a plant
	a swelling that is the characteristic lesion of tuberculosis