Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
spūmĭfer, ĕra, ĕrum, adj. [spuma-fero], foam-bearing, foaming (poet.): amnis, Ov. Am. 3, 6, 46: fons, id. M. 11, 140: fluctus, Stat. Achill. 1, 59.