Hearthmate

noun
One’s fellow resident in a shared household.
Source
Coming of Age in Karhide

Hegemonarchy

noun
A form of government comprising a ruling class and a supreme leader.
Origin
Portmanteau of ‘hegemony’ and ‘monarchy’.
Source
Use of Weapons

Hier

verb
To perceive the thoughts of others telepathically.
Origin
Corruption of ‘hear’.
Source
Norstrilia

Hilf

noun
Acronym of “high intelligence life form”.
Source
Planet of Exile

Hilfer

noun informal
An ethnologist of high intelligence life forms.
Source
Rocannon’s World

Holodeck

noun
A simulated reality installation.
Origin
Derived from ‘holographic’.
Source
Star Trek: The Next Generation

Homeopape

noun
A personalised newspaper containing only news items in which the reader has expressed an interest.
Origin
Abbrevation of ‘homeostatic newspaper’.
Source
Ubik

Hyperdrive

noun
A propulsion system for hyperspace travel.
Source
Star Wars Episode IV: A New Hope

Hyperspace

noun
A spacial dimension through which faster-than-light travel is possible.
Source
The Voyage of the Space Beagle

Immernaut

noun
A crewperson aboard a vessel that breaches the meniscus of everyday space.
Origin
Derived from immersum (under the surface) and nautēs (sailor).
Source
Embassytown

Impietist

noun
One who practises impiety.
Origin
Pairing of ‘impiety’ with the suffix -ist (to practice).
Source
Against A Dark Background

Infofiche

noun
A mutable, foldable, transparent plastic which can display images and text.
Origin
Abbreviation of ‘information’ and fiche (a card).
Source
A Memory Called Empire