Aphabetic letter pairs in words

MI: antihistamine

MJ - ramjet

MK: bumkin

MK = gymkhana

ML = harmless

MM: immunocompetent

MN = omniscient

MO: cardiopulmonary

MP - stump

MQ: kumquat

MR: comradeliness

MS = crimson

nm

MT = femtometer

MU: ammunition

MV- Triumvirate

MW - teamwork

MX = Damxung

a county in Tibet

MY - gloomy

MZ: hamza. In Arabic orthography it denotes a glottal stop.

NA- Nanotechnology