inflorescence vs corymb

inflorescence and corymb both are nouns.

Word	Noun	Adjective	Verb	Adverb
inflorescence	Yes	No	No	No
corymb	Yes	No	No	No

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

inflorescence: the flowering part of a plant or arrangement of flowers on a stalk
corymb: flat-topped or convex inflorescence in which the individual flower stalks grow upward from various points on the main stem to approximately the same height; outer flowers open first

Other hyponyms of inflorescence include flower head, ament, catkin, umbel, flower cluster, cyme, spike.

inflorescence (noun)	corymb (noun)
the flowering part of a plant or arrangement of flowers on a stalk	flat-topped or convex inflorescence in which the individual flower stalks grow upward from various points on the main stem to approximately the same height; outer flowers open first
the time and process of budding and unfolding of blossoms