Common in English, where in some putative compounds, such as autocrat or technocrat, both members would be combining forms.
Source: wiktionary
Combining form
Synonyms for "combining form" (7 found)
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Related word relations
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More general
2 entriesbound formbound morpheme
Sample sentences
2 total sentences available.
As far as possible this specification uses non-combining characters, however, in the cases tdot, TripleDot and DotDot Unicode only has combining forms of the accents, and so the entity replacement text starts with a space, to avoid the possibility that the expansion of the entity combines with preceding text.
Source: wiktionary