Ingression refers to the act of entering or penetrating into something. There are several synonyms for this word, including entrance, access, admittance, ingress, arrival, invasion, infiltration, and infusion. Each of these words emphasizes a unique aspect of ingress, highlighting the different ways in which something can be entered. For example, entrance and access suggest a more formal means of ingress, while infiltration and invasion imply a more forceful approach. Regardless of the synonymous word chosen, they all relate to the concept of ingress as the act of penetrating into something or gaining entry into a particular space or object.