chance A2

/t͡ʃæns/ a risk involving danger

accident A2

/ˈæk.sə.dənt/ anything that happens suddenly or by chance without an apparent cause

incident B1

/ˈɪn.sɪ.dənt/ (sometimes followed by `to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence

coincidence B2

/koʊˈɪnsɪdəns/ the temporal property of two things happening at the same time

occasion B1

/əˈkeɪʒən/ reason

accidentally B1

/ˌæk.sɪˈdɛnt(ə)li/ without advance planning

casual B1

/ˈkæʒ(u)əl/ marked by blithe unconcern

parachute B1

/ˈpæɹəʃut/ A small collar which fastens around the scrotum and from which weights can be hung.

decay B2

/diˈkeɪ/ an inferior state resulting from the process of decaying

casualty C1

/ˈkæʒu.əlti/ a decrease of military personnel or equipment

coincide B2

/ˌkoʊɪnˈsaɪd/ to happen simultaneously

cascade B2

/kæsˈkeɪd/ a sudden downpour, as of tears or sparks, likened to a rain shower

incidence C1

/ˈɪn.sɪ.dəns/ the striking of a light beam on a surface