3 letters

@wolfgang59 said

IAI

liaison

IJO

@handyandy said
liaison

IJO

bijoux

RTM

@wolfgang59 said
bijoux

RTM

department

YRT

@forkedknight said
department

YRT

myrtle

YXO

@kewpie said
myrtle

YXO

myxovirus

WKW

@the said
myxovirus

WKW

awkward

MDU

@kewpie said
awkward

MDU

Dumdum? I was thinking of it like an insult, but it looks like it's actually a type of bullet.

ZVO

@the said
ZVO

rendezvous

MNB

@handyandy said
rendezvous

MNB

hymnbook

FAH

@handyandy said
rendezvous

MNB

hymnbook

... I'm too slow ...

@wolfgang59 said
hymnbook

FAH

loofah

RWT

@orangutan said

RWT

A clue ...
It's a welsh five letter word.

@orangutan said
A clue ...
It's a welsh five letter word.

crwth?

@handyandy said
crwth?

Bingo.
YouTube
It's one of those words that comes in handy for playing scrabble when you've no vowels.

@orangutan said
Bingo.
[youtube]T8G1ZVLP_tc[/youtube]
It's one of those words that comes in handy for playing scrabble when you've no vowels.

In this case w is a semivowel.