The phrase "are a suitable substitute" is correct and usable in written English.
You can use it when discussing alternatives or replacements for something, indicating that the alternative is appropriate or acceptable.
Example: "In many recipes, applesauce and mashed bananas are a suitable substitute for oil, providing moisture without the added fat."
Alternatives: "serve as an appropriate replacement" or "act as a fitting alternative."
While such boundaries may underestimate the influence of CCPs or alcohol outlets on adjacent neighbourhoods, Stafford et al 43 found that administrative boundaries are a suitable substitute for neighbourhoods otherwise defined by socioeconomic homogeneity or physical boundaries.
Due to their similar chemical composition, general availability and large size, bovine teeth are a suitable substitute for human dental hard tissues in in situ examinations, and a more uniform reaction can be expected using these specimens [ 42].
Friends are a suitable substitute.
But this year, the Jets drafted a running back in LaMont Jordan who would be a suitable substitute when Martin needed a break.
It can be described as the creation of disorder and mischief for which perhaps the word oppression is a suitable substitute, as used in most English translations.
For Basel, Sousa's performances as opposition manager in successive seasons were evidence enough that his modus operandi was a suitable substitute for Murat Yakin, who now coaches Spartak Moscow.
While the Juvenile Diabetes Research Foundation continues to enthusiastically support California's Proposition 71 and other state measures to support this research, we do not believe that a state-by-state approach to stem cell research is a suitable substitute for an expanded federal policy.
Some fret about the effect of "proxy hedging": if an investor can't buy a CDS on Italy itself, a swap on a large Italian bank, which would almost inevitably fall over in the case of a sovereign default, is a suitable substitute.
Regardless of the convenience (ID13) electronic communication permitted, DE students simply failed to believe interactive online platforms were a suitable substitute for 'real' human interactions.
Hydroponically grown green wheat is a suitable substitute for a portion of the DRC and CSM in ewes diets during gestation and lactation without negative effects.
These preliminary studies suggest that the new recording system might be a suitable substitute for the routine 10-20 systespeciallyally in young infants and neonates.
