Names of most types of flowers and trees (exceptions: der Ahorn)

Names of German rivers (exceptions: rivers in the SW are masculine)

Names of cardinal numbers

Names of planes and ships

Most nouns ending in -e (exceptions: those with prefix Ge- and those denoting males)

Nouns ending in -heit, -keit and -schaft

Nouns ending in -in (persons only)

Nouns ending in -ei (exceptions: nouns denoting a type of egg eg. das Spiegelei)

Nouns ending in -ung (as a suffix! note: der Sprung and related compounds, e.g. der Absprung, der Vorsprung)

Nouns of foreign words ending in -ade, -age, -anz, -enz, -ette, -ie, -ik, -ine, -ion, -isse, -itis, -ive, -tät and -ur