Practice
Put Into Practice
noun, verbal noun, の adjective
To tell you the truth, practice is practice. You can't just substitute something else for it. You'll only make progress with real practice! You can do it!
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
理論は実践に移してこそ意味があるのです。
Theories are meaningful only if put into practice.