| ABS | • abs adj. Abbreviation of abstract. • abs n. (Informal) The abdominal muscles. plural of ab. • abs n. Acronym of absolute temperature. |
| BAS | • bas n. Plural of ba. • bas v. Third-person singular simple present indicative form of ba. • bas sym. (International standards) ISO 639-2 & ISO 639-3 language code for Basaa. |
| BES | • bes v. (Now chiefly dialectal) third-person singular simple present indicative form of be. • bes v. (Dialectal, nonstandard) Present tense inflected form of be: am or are. • bes n. (Historical, numismatics) A bronze coin of the Roman Republic, worth two thirds of an as. |
| BIS | • bis n. Plural of bi. • bis adv. Twice; showing that something is, or is to be, repeated, such as a passage of music, or an item in accounts. • bis sym. (International standards) ISO 639-2 & ISO 639-3 language code for Bislama. |
| BOS | • bos n. Plural of bo. • bos sym. (International standards) ISO 639-2 & ISO 639-3 language code for Bosnian. • Bos prop.n. A taxonomic genus within the family Bovidae – the cattle. |
| BUS | • bus n. (Automotive) A motor vehicle for transporting large numbers of people along roads. • bus n. An electrical conductor or interface serving as a common connection for two or more circuits or components. • bus n. Part of a MIRV missile, having on-board motors used to deliver the warhead to a target. |
| BYS | • bys n. Plural of by. • BYS sym. (International standards, obsolete) Former ISO 3166-1 alpha-3 country code for Byelorussian SSR from 1974 to 1992. • b'ys n. Plural of b’y. |
| OBS | • obs adj. Abbreviation of obsolete (as a gloss for words in dictionaries). • obs adj. Abbreviation of observed. • obs n. (Medicine) Observation(s) (blood pressure, temperature, etc). |
| SAB | • sab v. (Informal) To sabotage, especially fox hunts in opposition to blood sports. • sab n. (Informal) A saboteur, especially of fox hunts. • sab n. (Heraldry) Abbreviation of sable. |
| SIB | • sib adj. Having kinship or relationship; related by same-bloodedness; having affinity; being akin; kindred. • sib n. Kindred; kin; kinsmen; a body of persons related by blood in any degree. • sib n. A kinsman; a blood relation; a relative, near or remote; one closely allied to another; an intimate companion. |
| SOB | • sob n. A cry with a short, sudden expulsion of breath. • sob n. (Onomatopoeia) sound of sob. • sob v. (Intransitive) To weep with convulsive gasps. |
| SUB | • sub n. A submarine. • sub n. A submarine sandwich: a sandwich made on a long bun. • sub n. (Informal) A substitute, often in sports or teaching. |