Aphabetic letter pairs in words

HC - havoc

HD = hardwood

HE - hedge

HF = half

HG: handbag

HH = hashish

HI = hippopotami (false plural formation, but accepted by dictionaries)

HJ: haj (or hadj, or hajj)

HK = hillock

HL = helpful

HM: helium

HN: honeymoon

HO: hullabaloo

HP = help

HQ = Hariq

a 19th Century Kurdish poet

HR: harbinger

HS - hummus

HT - halibut

HU = haiku

HV = Harv

short for Harvey