| Word | Definitions | Synonyms |
|---|---|---|
| heptad | (noun) the cardinal number that is the sum of six and one | Synonyms: 7, septenary, septet, seven, sevener, VII |
| octad | (noun) the cardinal number that is the sum of seven and one | Synonyms: 8, eight, eighter, eighter from Decatur, octet, octonary, ogdoad, VIII |
| pentad | (noun) the cardinal number that is the sum of four and one | Synonyms: 5, cinque, fin, five, fivesome, Little Phoebe, Phoebe, quint, quintet, quintuplet, V |
| tad | (noun) a slight amount or degree of difference | Synonyms: shade |