13 letters
- silvicultural25
- silvicultures24
- sociocultural23
- spectacularly27
- specularities21
- speculatively28
- stonecuttings21
- stratocumulus23
- streptococcus26
- subculturally27
- supercurrents22
- sylvicultures26
- transcultural21
- tubocurarines22
- unarticulated21
- uncalculating27
- uncircumcised29
- uncustomarily25
- undercurrents21
- unspectacular26
- vacuousnesses23
- vascularities22
- vermiculation26
- vernacularism26
- vesiculations23
- viticulturist23