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Economiser

noun

Noun

1
Alternative form of economizer. UK, alt-of, alternative
"These locomotives have now had their economisers removed, while retaining the boilers of smaller-than-standard diameter [...]. Trouble, however, is being experienced owing to the fact that, without the retarding and lowering effect of the economiser on the velocity and temperature respectively of the firebox gases, severe burning of the superheater elements is occurring."
2
a frugal person who limits spending and avoids waste wordnet

From economise + -er.

Unscramble this word: economiser