simultaneous /sim-əl-tāˈnyəs, -ni-əs or (N American) sīˈmul-/

1. Being or happening at the same time
2. (of equations) satisfied by the same roots (mathematics)

In chess, an exhibition in which one player plays several opponents at once (usu shortened to simul)

simultaneity /-tə-nēˈi-ti or -nāˈ/ noun

1. The quality of being simultaneous, coincidence
2. A basic consequence of relativity, that two events that are simultaneous for one observer may occur at different times for another observer in another reference frame moving relative to the first (physics)

simultāˈneously adverb

• clearing-nut
• clearing-nuts
• clearings
• clearing sale
• clearing sales
• clearly
• clearness
• clearnesses
• clear-obscure
• clear off
• clear one's throat
• clear out
• clear-out
• clears
• clear-sighted
• clear-sightedly
• clear-sightedness
• clearskin
• clear-starcher
• clear-starchers
• clear-starching
• clearstories
• clearstory
• clear the air
• clear the decks