Some kanji have multiple readings, which can make things difficult if you're only hearing the names or seeing them written in romaji.
Looking up the Japanese names you can look up the individual kanji. You can even search the romaji spelling on
Jisho.org, try searching the words individually (
zenkutsu works, but "dachi" is actually a version of
立ち, tachi, stance), or remove the spaces (works for "
maegeri," but there's no entry for "zenkutsudachi").
As always, I recommend doing a little language study to help with the Japanese terminology and pronunciation. It's hard if you aren't already interested in the language, but it can help deepen understanding of your techniques, so that's a good motivation. It's always awkward when I talk to someone and can't quite work out what they're saying because they've been mispronouncing the Japanese words for decades. There's no retraining after a lifetime of saying "ooh-key" for uke.