ad-lib
...his lines, but he ad-libbed convincingly

also
not only... but also...

antic
he says nothing but antics

anyhow
...very difficult, but you can try anyhow

anyone
anyone but him

anything
anything but!

beauty
beauty is but skin-deep

blow over
...cross now but it will blow over in a day or two

but
but yesterday

choose
I cannot choose but...

dice
I tried to do it, but it was no dice

dissuade
...dissuade her but she did not relent

glorified
to be nothing but a glorified...

gubbins
...is here, but most of the gubbins are missing

inclined
to be anything but inclined to...

lacking
lacking but a little

not
not but what / not but that

notwithstanding
...is difficult, but insists on it notwithstanding

probable
that is possible but not probable

reck
to reck but little of

remedy
there is no remedy but...

select
few, but select

seriously
but seriously, would you like to do it?

shall
he says he won't pay, but he shall

silvern
speech is silvern, but silence is golden

slender
we had but slender hope that...

slowly
slowly but surely

surely
he works slowly but surely

theory
...in theory but not in practice

tincture
he has but a tincture of Portuguese