Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb upend

2 senses of upend

Sense 1
upend -- (become turned or set on end; "the airplanes upended")
       => overturn, turn over, tip over, tump over -- (turn from an upright or normal position; "The big vase overturned"; "The canoe tumped over")

Sense 2
upend -- (set, turn, or stand on end; "upend the box and empty the contents")
       => put, set, place, pose, position, lay -- (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")

Antonyms of adj upended

1 sense of upended

Sense 1
upended -- (turned up on end)

INDIRECT (VIA horizontal, vertical) -> inclined -- (at an angle to the horizontal or vertical position; "an inclined plane")
INDIRECT (VIA vertical, inclined) -> horizontal -- (parallel to or in the plane of the horizon or a base line; "a horizontal surface")

Similarity of adj upended

1 sense of upended

Sense 1
upended -- (turned up on end)
       => vertical (vs. inclined) (vs. horizontal), perpendicular -- (at right angles to the plane of the horizon or a base line; "a vertical camera angle"; "the monument consists of two vertical pillars supporting a horizontal slab"; "measure the perpendicular height")