it is a selective it is a sense it is a sensitive it is a separate it is a series it is a serious it is a serious matter it is a serious problem it is a service it is a set it is a shame it is a shameful it is a shared it is a shock it is a shocking it is a short it is a show it is a shrub it is a side it is a sight it is a sign it is a signal it is a significant it is a silent it is a silly it is a similar it is a simple it is a sin it is a single it is a singular it is a sister it is a site it is a situation it is a skill it is a slightly it is a slow it is a slow process it is a small it is a small island it is a small town it is a small village it is a small world it is a smart it is a social it is a society it is a soft it is a software it is a solemn it is a solid it is a solution it is a song it is a sophisticated it is a sort it is a sound it is a source it is a sovereign it is a space it is a spanish it is a special it is a special case it is a special day it is a specialized it is a specialty it is a species it is a specific it is a spirit it is a spiritual it is a sport it is a square it is a stable it is a stage it is a standard it is a staple it is a star it is a start it is a state it is a statement it is a station it is a step it is a step forward it is a stone it is a story it is a straight it is a straightforward it is a strange it is a strategic it is a strategy it is a strength it is a striking it is a strong it is a structural it is a structure it is a struggle it is a study it is a stupid it is a style it is a subject it is a subset it is a substance