KEEP ONE - CHANGE ONE!

[the.calm.before.the.prawny]

Keep one word and change the other word.

e.g first poster - spare tyre

second poster - spare bed

third poster - bunk bed
I'll continue with

bed room

[knatterzinken]

soft ware

[lonely*lady]

soft soap

[1jeffery53]

soap opera

[ntl!]

opera singer

[1jeffery53]

opera-bouffe

[ntl!]

opera window

[rustymarton]

sash window

[shaddickp]

window cleaner

[knatterzinken]

vacuum cleaner

[1jeffery53]

dry cleaner

[ntl!]

dry martini

[walesrules]

dry rot

[cats.pyjamas]

blow dry

---

[walesrules]

blow hard

[cats.pyjamas]

hard luck

---

[lonely*lady]

hard cheese

[the-end-is-near]

Swiss cheese

---

[lonely*lady]

Swiss chocolate

[knatterzinken]

Swiss watch

[walesrules]

pocket watch