-man это
ENT-человек
FR -man 
- Суффикс (Suffix)SUF-man
- Someone (implied male) who is an expert in an area.
- horseman, sportsman
- Someone (implied male) who is employed or holds a position in an area.
- lawman, newsman
- Someone (implied male) who has special characteristics relating to an area.
- freeman, iceman, superman
- In certain cases, someone (implied male) who derives from a particular nationality.
- Scotsman, Chinaman
- Someone (implied male) who is an expert in an area.
Definition of -man in English Dictionary
- Часть речи Иерархии (Part-of-Speech Hierarchy)
- Морфемы
- Суффиксы
- Суффиксы
- Морфемы
Источник: Викисловарь
Грамматически, это слово "-man" является Морфемы, более конкретно, Суффиксы.