Manpower vs. Resource Power
The term "Man-power" refers to individuals who are currently employed in a field or a company. However, this maybe exclusive to other genders working in the similar field by categorizing them as "men", even when the user does not intend to do so.
Mankind vs. Humanity
Similarly, the term "Man-kind" starts off with the prefix "man". In context, the term "man" refers to all humans. Nevertheless, due to the actual definition of the term -- that it refers to human male, it maybe exclusionary other genders
Policewoman & Policeman vs Police officer
In context of professions, unless otherwise specified, it is always better to use the gender-neutral alternative(Officer), in place of gender-specific professions to avoid gender bias.