Which are the two spells, whose incantations' starting letters are different, but the last 6 letters are exactly same?

P.S. Hint= One of them is invented by The Half Blood Prince.

P.P.S Change of marks given at every answer (quickest) from 15 to 100.

P.P.P.S New Rule!! THE HOUSE THAT THE USER WHO GIVES THE CORRECT ANSWER BELONGS GET POINTS, BUT THE OTHER HOUSES LOSE 5 POINTS EACH.

P.P.P.P.S I would like it if a Gryffindor gives answer.. (I am a Gryffindor myself)

P.P.P.P.P.S. Although I would give the same number of points to answers from other houses as well.

Gryffindor. 500

Hufflepuff. 400

Ravenclaw. 300

Slytherin. 100