 The study aims to explore how individuals who express loneliness on an online loneliness forum communicate in an online non-loneliness forum, using natural language processing algorithms and cycle linguistic dictionaries. The results show that these users tend to use more words associated with sadness, seeking socialization, valence, dominance, relationships, family and friends, and mental health in their posts on the non-loneliness forum compared to a control group of users who did not belong to any loneliness forum on Reddit. These findings can inform the design and implementation of online interventions around loneliness. This article was authored by Aniety Andy.