joyance > merrymaking; delight (this word apparently coined by Spenser)
5 As if no sorrow she neither felt nor dread;
dread > dreaded, feared; dread, fear (object of "felt": in either case the double negative supplied by "no" is intensive)
6 That evil matched pair they seemed to be:
That > [So that an]
7 An angry wasp the one in a vial had, 8 The other in hers a honey-lady bee;
hers > (Presumably, her vial) honey-lady bee > honey-laden bee; or, less likely: lady honeybee, hence: female honeybee, worker bee, queen bee
9 Thus marched these six couples forth in fair degree.
degree > manner; order
312.19