Nouns

(n)suctiona force over an area produced by a pressure difference
(n)sucking, suck, suctionthe act of sucking

Verbs

(v)suctionremove or draw away by the force of suction“the doctors had to suction the water from the patient's lungs”
(v)suctionempty or clean (a body cavity) by the force of suction“suction the uterus in an abortion”