Wordnet 3.0
ADVERB (1)
1. 
 spatially or metaphorically from a higher to a lower level or position; 
- Example: "don't fall down"- Example: "rode the lift up and skied down"- Example: "prices plunged downward"[syn: down, downwards, downward, downwardly]
WordNet (r) 3.0 (2006):
downwardly
    adv 1: spatially or metaphorically from a higher to a lower
           level or position; "don't fall down"; "rode the lift up
           and skied down"; "prices plunged downward" [syn: down,
           downwards, downward, downwardly] [ant: up,
           upward, upwardly, upwards]