The best replacement for atom is rss.

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Your alternative for atom is not listed? Suggest!
Speaking about atom, one probably shouldn't forget about electron.

Other search terms related to atom and their ratings are:
★★★★★ electron
★★ one electron
You have in mind a companion for atom and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of atom in all years. Click on graph for more.
atom
rss
molecule