nodule vs tubercle

nodule and tubercle both are nouns.

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

As nouns, nodule and tubercle are synonyms defined as:

nodule (noun)	tubercle (noun)
a small node	a protuberance on a bone especially for attachment of a muscle or ligament
(mineralogy) a small rounded lump of mineral substance (usually harder than the surrounding rock or sediment)	small rounded wartlike protuberance on a plant
small rounded wartlike protuberance on a plant	a swelling that is the characteristic lesion of tuberculosis