boom·let 
/ˈbu:mlət/ noun
plural boom·lets /ˈbu:mlət/ noun [count] : a sudden and usually brief increase in business activity : a small boom
▪ A few years ago, the town enjoyed a nice boomlet, but since then times have been tough.
▪ A few years ago, the town enjoyed a nice boomlet, but since then times have been tough.
