1) Compact 2) Densely populated or crowded 3) Driven together 4) Like some teeth 5) Tightly packed 6) Type of tooth 7) Wedged 8) Wedged or packed in together Found on https://www.crosswordclues.com/clue/impacted
(im-pak´tәd) being wedged in firmly. In obstetrics, denoting twins so situated during delivery that the pressure of one against the other prevents complete engagement of either. Found on http://www.encyclo.co.uk/local/21001
Im·pact'ed adjective Driven together or close. Impacted fracture (Surg.) , a fracture in which the fragments are driven into each other so as to be immovable. Found on http://www.encyclo.co.uk/webster/I/15
tightly or immovably wedged in. · noting a tooth so confined in its socket as to be incapable of normal eruption. · driven together; tightly packed. · densely populated or crowded; overcrowded: an impacted school district. Found on https://www.infoplease.com/dictionary/impacted