Let's see if anyone can beat 11.
locks (admittedly, some of these are stretches):
If those are too much of a stretch, Air has 10:
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The homophones for the word "you" are yew and ewe.
Some homophones for "forward" are foreword, for word, and four word.
Some homophones for the word "projects" are "prophets" and "prorogues."
Two homophones for the word "vain" are vein and vane.
The homophones of "look fierce" are "luke" and "fears".