| Word | Definitions | Synonyms |
|---|---|---|
| feetfirst | (adverb) with the feet foremost | - |
| first | (adverb) before anything else | Synonyms: first of all, first off, firstly, foremost |
| (adverb) prominently forward | Synonyms: foremost | |
| (adverb) the initial time | - | |
| (adverb) before another in time, space, or importance | - | |
| firsthand | (adverb) from the original source; directly | Synonyms: at first hand |
| firstly | (adverb) before anything else | Synonyms: first, first of all, first off, foremost |
| headfirst | (adverb) with the head before the body | Synonyms: headlong |