15-letter words containing p, e, s, o, b
- spiral notebook — a notebook held together by a coil of wire passed through small holes punched at the back edge of the covers and individual pages
- spotted cowbane — a North American water hemlock, Cicuta maculata, of the parsley family, having a purple-mottled stem, white flowers, and deadly poisonous, tuberlike roots.
- strephosymbolia — a condition of perceiving objects as their mirror image and, specifically, having difficulty in distinguishing letters in words
- streptobacillus — any of various bacilli that form in chains.
- sub-post office — (in Britain) a post office run by a sub-postmaster or sub-postmistress as a self-employed agent for the Post Office
- subject pronoun — pronoun in nominative case
- subperiosteally — the normal investment of bone, consisting of a dense, fibrous outer layer, to which muscles attach, and a more delicate, inner layer capable of forming bone.
- subprofessional — being below professional standards: subprofessional health care.
- subreptitiously — in a subreptitious manner
- substratosphere — the upper troposphere.
- sweep the board — (in gambling) to win all the cards or money
- uncompromisable — that cannot or should not be compromised
- viper's bugloss — the blueweed.
- visible exports — goods sold to a foreign country or countries
- visible imports — products that a company or country buys from other countries