contaminant/kənʹtaminənt/ noun

• unscripted
• unscrupulous
• unseal
• unsealed
• unseasonable
• unseasonal
• unseat
• unseeded
• unseeing
• unseemly
• unseen
• unselfish
• unsentimental
• unserviceable
• unsettle
• unsettled
• unsex
• unshackle
• unshakable
• unshaven
• unsheathe
• unship
• unsighted
• unsightly
• unsinkable