In American English the adjective special is overwhelmingly more frequent than especial in all senses: He might be of special help if you can't fully grasp the documentation. The reverse is real of your adverbs; here especially is by far the more typical: He is going to be of terrific help, especially In case you have issues understanding the documentation.
Ryan invites his previous faculty friends to some housewarming social gathering to rejoice his new condominium. They all bail on him, so he invites Kim above and lies the occasion was meant for her.
: relating to one point or course of factors : getting somebody character or trait owed them a special obligation not owed to the general public at massive The device 헬스케어 was specially suitable for a still left-handed operator.