We have put together a list of words that are similar to ACTINOID.

4 Alternative Words Similar to actinoid

1 Actinide Noun      Synonym Words Like Actinide
2 Actinon Noun      Synonym Words Like Actinon
3 Group Noun      Synonym Words Like Group
4 Grouping Noun      Synonym Words Like Grouping

5 definitions of actinoid

1 actinide
2 Having the form of rays; radiated, as in the species of the family Actiniidae.
3 Having the form of rays; resembling a starfish; conspicuously radiate: as, the actinoid type of echinoderms.
4 any of a series of radioactive elements with atomic numbers 89 through 103
5 having a radial form
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Wordnik, Wiktionary, Century, American Heritage, Gcide