Sorry, couldn't find any words matching gyaku.
You can also try a search for ぎゃく.
Names — 4 found
ぎゃくちょうせいダム
【逆調整ダム】
1. Gyakuchousei dam
ぎゃくせがわ
【逆瀬川】
1. Gyakusegawa
ぎゃくし
【虐師】
1. Gyakushi