1. Open to doubt or suspicion
   - doubtful, dubious, dubitable, doubtable

See also: questionable

• white chocolate
• white Christmas
• white cinnamon
• white cinnamon tree
• white clover
• white cockle
• white cohosh
• white corpuscle
• white crappie
• white croaker
• white currant
• white cypress
• white cypress pine
• white daisy
• white dead nettle
• white dipladenia
• white dog's-tooth violet
• white dogtooth violet
• white dwarf
• white dwarf star
• white elephant
• white elm
• white fairy lantern
• white false indigo
• white feather