Compound words
The last word decides: die Tür → die Haustür, der Schrank → der Kühlschrank, das Haus → das Hochhaus. Checked against 2344 words.
The last word decides: die Tür → die Haustür, der Schrank → der Kühlschrank, das Haus → das Hochhaus. This holds without exception and helps with a great many words.