• ghostfih,
• Bostrix,
• oostfix,
• lostfix,
• -ostfix,
• 0ostfix,
• pistfix,
• pkstfix,
• plstfix,
• ppstfix,
• p0stfix,
• p9stfix,
• poatfix,
• poztfix,
• postix,
• postifx,
• postfyx,
• pontifix,
• Pontafic,
• dostrix

• post-free,
• postbox.

The adjective form of the word "postfix" is "postfixal".

The plural of the "postfix" can be the "postfixes".

The singular of the "postfix" can be the "postfix".