Vocabulary consisting only from characters you are able to read
主な
omona
chief, main, principal, importantmix
守る
mamoru
(1)to protect/to guard/to defend/ (2)to keep (i.e. a promise)/to abide (by the rules)/to observe/to obey/to follow/(P) godan, jlpt3, leda1, verb, vtrans
大ヒット
daihitto
big hit, popular item (e.g. movie, music)ongaku
土木
doboku
public worksmix