1. Introducing a different topic; in point of fact
   - by the bye, incidentally, apropos

Encyclopedia: By the way

• false face
• false flax
• false foxglove
• false friend
• false fruit
• false garlic
• false gavial
• false glottis
• false goatsbeard
• false gromwell
• false hair
• false heather
• false hellebore
• false imprisonment
• false indigo
• false labor
• false labour
• false leg
• false lily of the valley
• false lupine
• false mallow
• false mildew
• false mistletoe
• false miterwort
• false mitrewort