Whortleberry
Part of speech: noun
Definition: any of several shrubs belonging to the genus Vaccinium the berry of one of these shrubs
Blueberry
Part of speech: adjective
Definition: Containing blueberries or having the flavour of blueberries.Of a dark blue colour.
Part of speech: noun
Definition: An edible round berry belonging to the cowberry family. (A botanically false berry.) It has flared "crowns" at the end that turn blue on ripening.The shrub of the above-mentioned berry.A dark blue colour.