Adolescence /ˌæd

appreciation /əˌpriː.ʃiˈeɪ.ʃ ə n/ noun [ U ] INCREASE
2. increase in price, value, etc.
There has been little appreciation in the value of property recently.
artefact /ˈɑː.tɪ.fækt/ /ˈɑr.t ̬ɪ-/ noun [ C ] mainly UK ( mainly US artifact )
an object that is made by a person, such as a tool or a decoration, especially one that is of historical interest The museum's collection includes artefacts dating back to prehistoric times.
artist /ˈɑː.tɪst/ /ˈɑːr.t ̬ɪst/ noun [ C ]
1. someone who paints, draws or makes sculptures
Monet is one of my favourite artists.
2. someone who creates things with great skill and imagination
He described her as one of the greatest film artists of the 20th century.