18-letter words containing h, o, b, l
- the bottomless pit — the underworld; hell
- thermonuclear bomb — hydrogen bomb.
- three-body problem — the problem of calculating the motions of three bodies in space moving under the influence of only their mutual gravitational attraction.
- tick all the boxes — to satisfy all of the apparent requirements for success
- tighten one's belt — a band of flexible material, as leather or cord, for encircling the waist.
- to bite the bullet — If someone bites the bullet, they accept that they have to do something unpleasant but necessary.
- to close the books — to balance accounts in order to prepare a statement or report
- to spill the beans — If you spill the beans, you tell someone something that people have been trying to keep secret.
- too clever by half — If someone is too clever by half, they are very clever and they show their cleverness in a way that annoys other people.
- up to the eyeballs — You use up to the eyeballs to emphasize that someone is in an undesirable state to a very great degree.
- widemouth blindcat — any of several catfishes, as Satan eurystomus (widemouth blindcat) of Texas, that inhabit underground streams and have undeveloped eyes and unpigmented skin.
- without obligation — In advertisements, if a product or a service is available without obligation, you do not have to pay for that product or service until you have tried it and are satisfied with it.