"looming" in the verb sense
come into view indistinctly, often threateningly
"Another air plane loomed into the sky"
2. loom, tower, predominate, hulk
appear very large or occupy a commanding position
"The huge sculpture predominates over the fountain"
"Large shadows loomed on the canyon wall"
3. brood, hover, loom, bulk large
hang over, as of something threatening, dark, or menacing
"The terrible vision brooded over her all day long"
weave on a loom
"materials loomed in Egypt"
Source: WordNet® (An amazing lexical database of English)
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