lean, tilt, angle, slant, tip - to incline or bend from a vertical position; "She leaned over the banister"

fall back - fall backwards and down

lay, place, put, set, position, pose - put into a certain place or abstract location; "Put your things here"; "Set the tray down"; "Set the dogs on the scent of the missing children"; "Place emphasis on a certain point"

recumb, recline, repose - lean in a comfortable resting position; "He was reposing on the couch"

rest - be at rest

lie - be lying, be prostrate; be in a horizontal position; "The sick man lay in bed all day"; "the books are lying on the shelf"

recline - cause to recline; "She reclined her head on the pillow"