Synonyms of the word

unprofessional

• adj. unbecoming of a professional; hence inappropriate in the workplace.
• n. One who is not a professional.

amateur

• n. (now rare) A lover of something.
• n. A person attached to a particular pursuit, study, or science as to music or painting; especially one who…
• n. Someone who is unqualified or insufficiently skillful.
• adj. Non-professional.
• adj. Created, done, or populated by amateurs or non-professionals.
• adj. Showing a lack of professionalism, experience or talent.

amateurish

• adj. Suggesting or reflecting the efforts of an amateur; not seeming professional or polished.

inexpert

• adj. Inept or unskilled; not of expert ability or quality.
• n. An inept or unskilled person.

unskilled

• adj. Of a person or workforce: not having a skill or technical training.
• adj. Of a job: not requiring skill or training.
• adj. Of a made object: inexpertly made or showing a lack of skill.