immunoglobulin
At the turn of the 20th century the term jazz had two spellings. The musical term Jazz was interchangeably used with jaz.
The term "Floppy disk" is also used in German as is "Diskette" or "Floppy"
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The term "ground" can be used interchangeably with "earthground."
The other common term is "webpage" (web page or simply page).
Another word for a SYNTHETIC resin is a plastic.
Republic
Prior to the late 1800s, the terms bookkeeping and accounting were often used interchangeably because the recording/posting process was central to both activities
Determination. (Sometimes, this word is interchangeably used in the meaning 'obstinacy')
A quatorzain is a poem of fourteen lines. Historically the term has often been used interchangeably with the term 'Sonnet'.
The term 'unthaw' is used interchangeably with 'thaw'. They mean the same thing. It does not mean 'refreeze'.