Aphabetic letter pairs in words

HH = withhold

HI: hip

HJ: mahjong

HK = babushka

HL - highly

HM: ohm

HN - archnemesis

HO: hoe

HP - watchpoint

HQ: HQ, headquarters

You could have gone for “earthquake”.

HR = throbbing

HS = weighs

HT = weight

HU = chuckle

Yes! Thanks.

HV: hove

Couldn’t find anything here, either. Are ther any?

Archvillain comes to mind.

HW: southward

HV = bushveld and highveld.

Thanks!

HW: thwack

HX = Probably a stumper, reducing us to trade names:

“High intensity, explosive training and conditioning program. HIGHX is a functional, systematic training format structured into multiple circuits.”