试试这个模式:

\b(?:a*(?:ha)+h?|(?:l+o+)+l+)\b

或者更好，如果您的正则表达式支持原子组和所有格量词:

or better if your regex flavour support atomic groups and possessive quantifiers:

\b(?>a*+(?:ha)++h?|(?:l+o+)++l+)\b