Strong, Mutual Attraction; to Have __ With Someone
Puzzle 9 of Travel Souvenirs Medium Pack
Question is: Strong, Mutual Attraction; to Have __ With Someone
and the answer is: CHEMISTRY
Word Meaning:
CHEMISTRY — (uncountable) The branch of natural science that deals with the composition and constitution of substances and the changes that they undergo as a consequence of alterations in the constitution of their molecules.
Definitions from Wiktionary.