The paper aims at analyzing the paradigmatic relationship between the verbs ἔρχομαι and ἦλθον in Homeric Greek. Both verbs convey the idea of going within a Homeric suppletive paradigm. Although suppletivism between ἔρχομαι, εἶμι, ἐλεύσομαι (future), ἦλθον (aorist), εἰλήλουθα (perfect) is generally accepted, there is still uncertainty on both etymology and semantic features involving inherent actionality, with particular reference to ἔρχομαι. Therefore, the actional status of ἔρχομαι and its relationship with ἦλθον need further investigation. A textual analysis of the Homeric occurrences of both ἔρχομαι and ἦλθον, focusing on the semantic-syntactic discourse context, has shed light on their mutual suppletive relationship and proved that it is ultimately based on their inherently actional opposition within the paradigm.