the first person to finish this get brainlist,if your the only one answer i WILL remember to give your brainlist (complete it)

Answer:
Sharp+en = Sharpen
Lead+ er = leader
joy+ful = Joyful
Comfort+able = Comfortable
Collect+ion = Collection
Help+less = Helpless
glad+ly = Gladly
Dark+ness = Darkness
________________________
(bottom up)
Kind+ness = Kindness
Harm+ness = Harmless
Correct+ion = Correction
Fair+ly = Fairly
________________________
I hope this makes sense!