There are 22 7-letter words that start with 'bio'.
| biochip | biocide | biofilm | biofuel |
| biogens | biogeny | bioherm | biology |
| biomass | bionics | bionomy | biontic |
| biopics | biopsic | bioptic | biotech |
| biotics | biotins | biotite | biotope |
| biotron | biotype | ||
Note: These 22 7-letter words that start with 'bio' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with biom, bios, biog, biot, bioc, biop, biol, bioe, bior, biof, bion, bioa, biod, bioh, biow, biov.
4-letter words start with 'bio' (2)