Memory trick for the word \textbf{Accommodation}:
\[
\textbf{Accommodation → 2 C's and 2 M's}
\]
Think of it as:
\[
\textbf{AC + COM + MODATION}
\]
Many students mistakenly write only one \textbf{c} or one \textbf{m}, but the correct spelling has \textbf{double c and double m}.