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| English | German |
| four-bearded rockling | Vierbärtelige Seequappe (Rhinonemus cimbrius (Linnaeus)) |
| four-finger threadfin | Riesenfadenfisch (Eleutheronema tetradactylum) |
| four-seed vetch | viersamige Wicke (Vicia tetrasperma Schreb./Moench) |
| four-wheel drive articulated tractor | Allrad-Schlepper mit Knicklenkung |
| four-wheel drive tractor with four even large wheels | Allrad-Schlepper mit vier gleich großen Rädern |
| four-wheel drive tractor with unequal wheels | Allrad-Schlepper mit ungleich großen Rädern |
| prairie four-o'clock | gemeine Wunderblume (Mirabilis jalapa L.) |