Part of speech: Noun
vertical space available to allow easy passage under something
Categories: Room, Way, Elbow room
Part of speech: Noun
the capacity of a system to reproduce loud sounds without distortion
Categories: High fidelity, Hi-fi
Dynamic headroom, Headway, Clearance, Headroom
head – A related word in the same word family.
room – A related word in the same word family.
Some English words are 'fossil words'—they only survive in idioms or fixed phrases.