Nodule
Part of speech: noun
Definition: A rounded mass or irregular shape; a little knot or lump.
Tubercle
Part of speech: noun
Definition: A round nodule, small eminence, or warty outgrowth found on bones especially for the attachment of a muscle or ligament. A small elevation on the surface of a tooth.A small rounded wartlike protuberance of the roots of some leguminous plants; the lip of certain orchids, cacti.A small rounded nodule forming the characteristic lesion of tuberculosis.A mass of hyphae from which a mushroom is produced.