"four" synonyms, related words, and opposites

Similar:

foursome, quadruplet, quartet, quaternity, quaternary, quaternion, quatern, tetrad, cardinal, IV, more...

Opposite:

five, six, seven, eight, nine

Types:

quads, quadruplets, quadruple, quadruplex, more...

Meter:

Adjectives:

part, twenty, forty, thirty, sixty, seventy, fifty, two, section, three, book

Colors:

blue, green, yellow, red, orange, purple, pink, brown, black, white

Crossword clues:

mississippi quartet, quart quartet, it means "four", ocho halved, 1 2 3 4, two two, cinq et quatre, two and two, three before seven, it's usually 4