Adult male and Male person

Adult male noun - An adult person who is male (as opposed to a woman).

Male person and adult male are semantically related. In some cases you can use "Male person" instead a noun phrase "Adult male".

Male person noun - A person who belongs to the sex that cannot have babies.

Adult male and male person are semantically related. Sometimes you can replace phrase "Adult male" with "Male person", this phrases are similar.