Semantic processing of concrete and abstract concepts in semantic variant primary progressive aphasia (sv-APP) was investigated by comparing the performance of 8 sv-APP patients with 20 age- and education-matched controls on a synonym judgment task. The results showed a concreteness effect, with better performance on concrete concepts (nouns and verbs) compared to abstract concepts. This finding aligns with previous research indicating that sv-APP patients perform worse on abstract concepts. The study supports the hypothesis of an amodal semantic hub involved in processing both concrete and abstract concepts. The lower impact on concrete concepts may be attributed to their greater semantic richness. The findings suggest that sv-APP patients exhibit a concreteness effect, contrary to some previous reports of an inverse concreteness effect. The study highlights the importance of semantic processing in sv-APP and provides evidence for the role of a distributed semantic network in conceptual processing. The results also indicate that sv-APP patients show better performance with verbs compared to nouns, which may be related to the involvement of frontal areas in verb processing. The study contributes to the understanding of semantic processing in sv-APP and the neural mechanisms underlying conceptual representation.Semantic processing of concrete and abstract concepts in semantic variant primary progressive aphasia (sv-APP) was investigated by comparing the performance of 8 sv-APP patients with 20 age- and education-matched controls on a synonym judgment task. The results showed a concreteness effect, with better performance on concrete concepts (nouns and verbs) compared to abstract concepts. This finding aligns with previous research indicating that sv-APP patients perform worse on abstract concepts. The study supports the hypothesis of an amodal semantic hub involved in processing both concrete and abstract concepts. The lower impact on concrete concepts may be attributed to their greater semantic richness. The findings suggest that sv-APP patients exhibit a concreteness effect, contrary to some previous reports of an inverse concreteness effect. The study highlights the importance of semantic processing in sv-APP and provides evidence for the role of a distributed semantic network in conceptual processing. The results also indicate that sv-APP patients show better performance with verbs compared to nouns, which may be related to the involvement of frontal areas in verb processing. The study contributes to the understanding of semantic processing in sv-APP and the neural mechanisms underlying conceptual representation.