18-letter words containing f, i, n, e, s, p
- self-contemplation — the act or process of thinking about oneself or one's values, beliefs, behavior, etc.
- self-deprecatingly — in a self-deprecating manner
- self-disparagement — the act of disparaging.
- self-preoccupation — the state of being preoccupied.
- self-tapping screw — a screw designed to tap its corresponding female thread as it is driven.
- slip of the tongue — If you describe something you said as a slip of the tongue, you mean that you said it by mistake.
- sonic depth finder — a sonar instrument that uses echolocation to measure depths under water.
- stepping-off place — jumping-off place (def 2).
- sweptwing aircraft — an aircraft which has wings that are swept (usually) backwards
- torsion-free group — a group in which every element other than the identity has infinite order.
- visiting professor — a professor from another institution invited to teach at a university or college for a limited period, usually for a semester or one academic year.
- wild passionflower — the maypop, Passiflora incarnata.