17-letter words containing f, o, t, b
- theory of numbers — number theory.
- transferable vote — a vote that is transferred to a second candidate indicated by the voter if the first is eliminated from the ballot
- troilus butterfly — spicebush swallowtail.
- uncomfortableness — causing discomfort or distress; painful; irritating.
- vibrofluidization — Vibrofluidization is when vibration is used to make particles move in a fluidized bed.